Power Problem In Hitachi 32″ LCD TV Solved
A 32” Hitachi LCD TV came in with the complaint of can’t power on. The power LED blinks few times and stayed red. This seems to be the power supply problem. After the removal of the big back cover with tons of screws finally I could see few circuit boards. The first thing I looked at was the power board to see if there are any bulged e-caps. Just under the big heatsink I saw two bulged e-caps.
In order to remove the bad e-caps one need to remove the heatsink first. After removed the bad e-caps I proceeded to check on the other e-caps and found one to be marginal and I replaced that e-cap too. Total replacement of 3 e-caps put the TV back to service.
Conclusion-There are always simple and tough problems in electronics equipment. Don’t always assume that it is very difficult to repair electronics equipment. One got to open the set up and check on it. If you did not open it up you would not know the answer. Even if it is tough to repair then take it as a lesson for you to learn. The more tough problems that you have repaired the better knowledge you will have on that equipment. If you are new to LCD TV repair and would like to know more about LCD TV internal boards you can click on the below link:
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http://www.electronicrepairguide.com/lcd-tv-repair-basic.html
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Jestine Yong
Please give a support by clicking on the social buttons below. Your feedback on the post is welcome. Please leave it in the comments. By the way if you have any good repair article that you want me to publish in this blog please do contact me HERE.
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Ivor
August 19, 2013 at 11:23 pm
why did you remove the heatsink and diodes and not just the heat sink?
Jestine Yong
August 20, 2013 at 7:04 am
Hi Ivor,
Because the diodes is attached to the heatsink secured by screws. This means soldering out only the heatsink legs would not be able to pull it out unless you also need to solder out the diodes legs.
Jestine
Kumar
August 19, 2013 at 11:25 pm
Fantastic articles
Ruben
August 20, 2013 at 4:06 am
Hi, I have a problem with a LCD tv brand Sanyo 24XH8 having the sides of the screen a thin vertical lines, I could help me find the failure? thank you.
Jestine Yong
August 20, 2013 at 7:05 am
Hi Ruben,
If the OSD menu affected as well then the problem could be a bad LCD panel otherwise check on the LVDS cable and the T-con board.
Jestine
Amir Mukhtar
August 20, 2013 at 4:51 am
Sir,
Thanks you for sharing such a nice tips and Knowledge.
God Bless you.
yours Student
Amir Mukhtar Ashrafi
Jestine Yong
August 20, 2013 at 7:03 am
Hi Amir,
You are welcome!
Jestine
Alex Lee
August 20, 2013 at 1:23 pm
The usual CrapXon capacitors again. And the Samxon didn't fare very well either. Seen plenty of them over the years, including those in LCD monitors also. The proximity of the heatsink to the capacitors especially the top area makes it worse, as heat can cause faster degradation of these (already crappy) capacitors.
Jestine Yong
August 20, 2013 at 5:12 pm
Hi Alex,
You are right about this.
Jestine
Waleed Rishmawi
August 20, 2013 at 3:39 pm
nice article. I just love this kind of repair. thanks for sharing
Jestine Yong
August 20, 2013 at 5:11 pm
HI Waleed,
You are welcome.
Jestine
hafeez
August 20, 2013 at 3:40 pm
Thank you sir for this artical
reza
August 20, 2013 at 9:58 pm
hello mr yong
tank for share this articl
Jestine Yong
August 21, 2013 at 9:05 am
Hi Reza,
You are welcome.
Jestine
David
February 7, 2014 at 12:21 am
Thanks sir for sharing this with us. It's Nice I Love it.THANKS.
Jestine Yong
February 7, 2014 at 10:28 am
HI David,
You are welcome!
Jestine
Tom Dunaj
August 21, 2013 at 12:25 am
Justine I sure enjoy reading the repairs and tips.
Even though I am unable to do repairs anymore I have parkinsons
and memory problems it sparks my interest I will always look forward
to reading your articles.
Thank You,Justine.
Tom
Jestine Yong
August 21, 2013 at 9:05 am
You are welcome Tom-take care.
jesine
Tyrone.
August 21, 2013 at 12:56 am
Thank you Jestine for this repair tip,and God bless you.
Jestine Yong
August 21, 2013 at 9:05 am
Hi Tyrone,
You are welcome!
Jestine
Ner
August 21, 2013 at 2:30 pm
I learned a lot from your tips, Keep up the good work.
Jestine Yong
August 21, 2013 at 8:34 pm
HI Ner,
Thanks.
Jestine
Clarence Hinkson
August 21, 2013 at 9:25 pm
Jestine your repair tips along with an e-book I purchased from you some time ago has helped me to repair an Olevia 42inch tv that had a similar problem to what is described in this article. I replaced all seven electrolytic capacitors on the power supply board that had some bulging and tested below their ratings. It now powers on again and is working fine. Keep up the good work.
Jestine Yong
August 21, 2013 at 9:30 pm
HI Clarence,
Congratulation! Thanks for the support on my ebook.
Jestine
anjan
August 22, 2013 at 1:23 pm
Hi, i am from Nepal i am electronic technician i have a problem about Samsung LCD Moniter is no power . i check everything is ok, but i cant get power .that make me to much expensive. so how can i solved this problem .please tell me a right suggestion . the model no is 720N [R]X - model code LS17MJVKB/XSS
Jestine Yong
August 22, 2013 at 9:44 pm
HI Anjan,
What have you checked and replaced? And dc voltage at the power ic pin? Have you checked all the secondary output diodes?
Jestine
shah
August 23, 2013 at 4:28 pm
Hi
Sir,
Thank you for good tips
Jestine Yong
August 23, 2013 at 9:12 pm
H Shah,
You are welcome!
Jestine
Roki
August 24, 2013 at 12:30 pm
Hi Jestine, did you replace the E-caps with the same kind or change to a higher voltage rating type? Change all to 50V perhaps?
Jestine Yong
August 24, 2013 at 11:34 pm
HI Roki,
I replaced with the same e-caps.
Jestine
Ngo Vinh Phu
August 28, 2013 at 12:23 am
Thank You Very Good You! Jestine Yong
Jestine Yong
August 28, 2013 at 9:01 am
Hi Ngo,
You are welcome!
Jestine
Tesfaye kebede
August 30, 2013 at 7:23 am
THANK YOU JEDTINE IT IS A HELPFUL REPAIR TIPS
jasunil
August 31, 2013 at 12:46 pm
your lessons are find sir,and please give me data pdf for ta7322p IC, this for Akai amplifire
Jestine Yong
September 2, 2013 at 10:21 am
Hi Jasunil,
Just go into google and type in the part number follow by datasheet.
Jestine
Luis
September 4, 2013 at 8:47 am
very well thank you very much
Jestine Yong
September 4, 2013 at 10:28 am
Hi Luis,
You are welcome!
Jestine
isagani cuaresma
September 8, 2013 at 7:49 am
thanks for sharing sir jestine. god bless
Jestine Yong
September 8, 2013 at 4:42 pm
Hi Isagani,
You are welcome.
Jestine
eas
September 13, 2013 at 8:42 am
Hi mr yong
i'm glad i've subscribe to ur site from time to time i'm recieving tips from email that helps me alot thank you for your kindness
eas
Jestine Yong
September 13, 2013 at 9:12 am
Hi Eas,
You are welcome!
Jestine
Patrick Adika
October 4, 2013 at 7:38 pm
Hi Mr Yong?
I really like your detailed way of solving problems. I have in the past benefited from your advice on the jungle IC power regulator Capacitor you remember one that used to loose contrast settings every time you adjust?????
Continue with your good work
Patrick Nairobi Kenya
Jestine Yong
October 4, 2013 at 8:57 pm
HI Patrick,
You are welcome and thanks for the support.
Jestine
Wole adu
October 6, 2013 at 7:51 am
Thank You for this posting.
I just repaired my LCD TV with same fault.
Jestine Yong
October 6, 2013 at 8:16 am
HI Wole,
You are welcome and good to hear that.
Jestine
Dionesio Estupa
October 7, 2013 at 9:27 pm
Hello sir Jestine thank you very much I really learn more about troubleshooting
Jestine Yong
October 7, 2013 at 10:33 pm
Hi Dionesio,
You are welcome.
Jestine
Mos
October 20, 2013 at 10:44 am
Hi Jestine,
I can't get a power IC FSQ510 (Fairchild) locally. Can I pay through western union if you can find one for me. Thanks.
Jestine Yong
October 21, 2013 at 9:39 am
Hi Mos,
Sorry i do not sell parts. Try utsourse.net or ebay.com to see if they have this part or not.
Jestine
Mos
October 23, 2013 at 2:12 pm
Thank you Jestine. One more question. Will it make a difference if I purchase the IC from the US which uses 110v. Our power rating is 240v.
Jestine Yong
October 23, 2013 at 8:52 pm
HI MOS,
No different as long as the part number is the same.
Jestine
uday
November 27, 2013 at 9:13 pm
Dear Justin
thanks for reguar update of LCD TV/monitor'
one of my LCD TV in office has same pblm which is mention above, i found two filter e-caps bulky and e.liquid come out . i replaced with new ones. TV work for a day, and same REd LED some time comes Green but LCD does not turn on. what is the plbm now, i check both filter e-cap was ok.
pls suggest?
Jestine Yong
November 27, 2013 at 10:16 pm
HI Uday,
I suggest that you recheck that area and you need to check filer cap with ESR meter. If you do not have this meter direct replace the e-caps and retest.
Jestine
Keith Ford
February 5, 2014 at 2:20 pm
Thanks for the article! Most Tv's have a small and simple problem,
Jestine Yong
February 5, 2014 at 2:50 pm
HI Keith,
You are welcome. Yes most TVs and other electronics gadget have many simple problems and it can be solved just by replacing few caps.
Jestine
chinedu
May 6, 2014 at 1:47 am
Master i am very glad for all your electronics repair tips you are sending to me,thank you very much,master i have little problem with one of my customer LCD television he brought to me,when i put it to the power source it bring red light,if press the power button it will start blinking continuosly without powering,i have checked the power board i did not see any bad capacitor inside it,i checked the 5volt output it gives me 4.9volts, master please help me out.the televissin model is LCD32-407 technika product.
Jestine Yong
May 6, 2014 at 7:58 pm
HI Chinedu,
Standby means either:
1) CPU IC got 5 volt but cannot send out the "On" signal due to the ic itself have problem or the EEPROM IC have corrupted
2) CPU IC could send out "On" signal but it can reach the main power supply section due to bad components in the optoisolator ic and surrounding components problem
3) On signal can reach the main power supply but main power supply it self have bad components like shorted secondary diodes, bad power ic and etc.
4) There are shorted components in the secondary side.
Jestine
Lindsey
November 20, 2015 at 4:28 pm
Hi I'm wondering if u could help I have a hitachi 32inch an it's about three years old !! When I turn it on it takes around 20 minutes for the actual picture to come on !! I've looked inside and everything looks ok can u help
Jestine Yong
November 20, 2015 at 8:22 pm
Hi Lindsey,
Perhaps you need to check the filter output caps with ESR meter as some caps will not bulge. If you do not have an ESR meter try check which output voltage line where the voltage is abnormal and then direct replace the e-caps in that line and retest.
Jestine
Asa Fisher
July 17, 2014 at 5:12 pm
Hi Jestin I don't have no Website Iam a woman fixing TV's I'm trying to fix LCD,plasma, and Led. Andprojector Tv's I have read you tip's and are thankful for it it help's me a lot I would be please if you send me also tip's thank you
Jestine Yong
July 17, 2014 at 7:58 pm
HI Asa,
May I know what tips you are referring to?
Jestine
Tony
November 3, 2014 at 8:31 pm
Greetings.......Kindly advise on my 32" Hitachi lcd tv. The power comes on but all pitch black; no sound or pictures. I checked for blown capacitors and all seems fine, i tested them using multimeter and they are fine. Then i checked the icu and noticed a path of it looks burnt with tiny hole. Now my problem is i cant get the number / code off the icu on the board as part of it is gone and no one seems to be able to help.......How do i get to replace the icu now if i cant identify it by code. I used model number and still no help. Can i use generic icu ? Prompt response pls......thanks
Jestine Yong
November 4, 2014 at 7:37 am
Hi Tony,
You need to search for the service manual to look for the part number. Unfortunately I don't have this service manual. What is the color of the power LED light?
Jestine
Tony
November 5, 2014 at 8:32 pm
The color of the LED is RED. Do i need to change the entire power board for it would cost a lot ? as oppose changing the ic. Note also it stays on red and would not respond to remote control
Jestine Yong
November 5, 2014 at 9:25 pm
Hi Tony
Red Led or Standby means either:
1) CPU IC got 5 volt but cannot send out the "On" signal due to the ic itself have problem or the EEPROM IC have corrupted
2) CPU IC could send out "On" signal but it can’t reach the main power supply section due to bad components in the optoisolator ic and surrounding components problem
3) On signal can reach the main power supply but main power supply it self have bad components like shorted secondary diodes, bad power ic and etc.
4) There are shorted components in the secondary side.
5) The DC supply input to the MCU/EEPROM IC may be improper. Make sure the DC supply is good.
Jestine
Mars
January 19, 2015 at 5:48 pm
Hi Mr.Jestine
Glad to know you, i just want to ask you about my LCD TV problem.The brand is LG 21inch. The problem is : the LED come red but the LCD not ON.
I have check the out put from power supply there is no voltage to back light of LCD.But i dont know what is the component should i change or checking.Thanks
So, Please help to guide me to do trouble shooting this fault.Thanks
admin
January 20, 2015 at 9:44 pm
Hi Mars,
Standby or Red LED means either:
1) CPU IC got 5 volt but cannot send out the "On" signal due to the ic itself have problem or the EEPROM IC have corrupted
2) CPU IC could send out "On" signal but it can’t reach the main power supply section due to bad components in the optoisolator ic and surrounding components problem
3) On signal can reach the main power supply but main power supply it self have bad components like shorted secondary diodes, bad power ic and etc
4) There are shorted components in the secondary side like inverter board/ mainboard and etc
5) The DC supply input to the MCU/EEPROM IC may be improper. Make sure the DC supply is good.
Jestine
Alex
September 30, 2015 at 2:15 pm
Hi Jestine
I have an Hitachi LCD tv 42" 7 years old
recently i'm having a problem turning it on from standby.
the problem is when I press the power button on the remote control the led turns to green and I get sound but no picture.
if I turn it off and on again it comes on OK.
some times I have to turn it off and on 2 or 3 times or more but eventually it will come on OK.
I think it can be a bad relay or electronic switch.
please advise
Alex
Jestine Yong
September 30, 2015 at 8:35 pm
HI Alex,
I suggest that you check for any bulged e-caps in the power supply section.
Jestine
Nicholas nikel
August 6, 2016 at 3:16 am
please I'm having problem with my 32inches LED tv and the problem is the power come's alright but nothing show on the screen
Jestine Yong
August 6, 2016 at 1:04 pm
Hi Nicholas,
What is the color of the power LED? Have you used torch light to shine at the screen to see if there is any dim picture? Try check out some led tv repair post below:
https://jestineyong.com/category/led-tv-repair/
Jestine
Willy
August 9, 2016 at 9:02 am
Mr.jestine Hong I'm having a problem of my Hitachi LCD 32 inches standby light doesn't come,it used to come after few hour when I plug to ac but after few day's doesn't the standby light any more,pls help any idea is highly appreciated,thanks
Jestine Yong
August 9, 2016 at 11:01 am
Hi Willy,
Have you checked if there is 5 volt standby output voltage from the power supply?
Jestine
Willy
August 9, 2016 at 1:41 pm
Mr Yong,There is no 5 volts supplying the standby.i already replace 2 bloated capacitor from secondary side of power supply but still the same,,is it possible to check from primary side I think there is no oscillation,what parts is possible to be replace all capacitors seems to be ok no bloated,thanks for repllyinng
Jestine Yong
August 9, 2016 at 2:26 pm
Hi Willy,
If no 5 volt output it can be caused by any components. This means you have to check the components in the primary side and no shorted output diode in secondary side. If all checked to be good then you need to replace the power ic and retest.
Jestine
Willy
August 10, 2016 at 6:56 am
Mr.yong thank you so much for your information I'll try your suggestion hopefully it works,thanks
Roland
November 15, 2016 at 3:04 am
Hi,
I used an HDMI splitter on my Hitachi LCD 42" TV, when I connected the AC adapter I did not change it to 5v from 9v. Well it fried it and because it was connected to my TV via the HDMI port it looks like it did something to my TV. Anyway, there is no power, no stand by red light. I trouble shoot it but nothing works. Any ideas on what else I could do? I will appreciate any help.
Jestine Yong
November 16, 2016 at 10:28 pm
Hi Roland,
What have you checked in the TV? Have you checked if the power supply has any output voltages?
Jestine
Joselito
June 26, 2017 at 8:16 am
My tv have power but there's no picture or whatever comes out in the monitor just a low blue ligths in the screen what is the solution for that, your help much highly appreciated.
Jestine Yong
June 26, 2017 at 10:40 pm
Hi Joselito,
What type of TV was that and what have you checked?
Jestine
Moiz
November 1, 2017 at 7:27 pm
Dear Sir
I have a hitachi 42 inch lcd tv i am facing a problem of no picture sound is ok it was working normaly and then the picture went of please see if you can help me to fix the problem
Jestine Yong
November 2, 2017 at 10:04 am
HI Moiz,
What have you checked in the TV?
Jestine
Billy
February 18, 2019 at 4:19 am
Hi Jestine! and Thank you!!! so much for the capacitor's tip. You saved me a bunch of time, and probably the TV as well.
I have the exact! same Hitachi TV and I am not sure if I would have found the caps without your help. They were very well hidden. And I am definitely do not have your trouble shooting skills.
For my TV. all 3 of the 470m caps were dead. In addition to the two 2200m caps.
So I ended up replacing 5 caps in total.
Jestine Yong
February 18, 2019 at 7:35 am
Hi Billy,
You are welcome.
Jestine
Ely
August 4, 2019 at 12:11 am
Hi jestine,
I have the same model and the problem is sound and screen is flickering. I already did changing the caps but it diidnt resolve the issue... Have you encounter this king of trouble?
Thanks.
Ely here
Jestine Yong
August 8, 2019 at 9:29 pm
Hi Ely,
Flickering can be due to many courses like unstable output dc voltages from the power supply, bad LCD panel, weak backlight, LVDS cable not seated properly and etc. Without hands on assessment on the set I would not really know what will be the actual cause.
Jestine
Jaw
September 16, 2022 at 4:56 am
Hello Mr jestin
I have hitachi model L32N03A I got problems then I change 3 capacity after that when I try to start the TV the led light flashing 3 time red and blue color after that the TV start normally. Why it's flashing 3 time before I start tv or need factory reset. Thanks