Acer Aspire 5560 Laptop Repair- No Power
Received a Acer Aspire 5560 Laptop for repair from customer with the complaint of no power symptom.
Primary inspection I found fault symptom as follows – No display on screen, battery led indicator lights up but does not light up the power LED.
After pressing power switch there was no power LED which means the laptop was not getting power from the adapter but the adapter checked to be good => +19 Vdc output. The orange LED lighted up means it gets power from the battery. Then where is the problem?
Now it is time to disassemble the Laptop for further inspection, so process of disassembling is started. I am always using empty matchbox for keeping bunch of screws. Removed keyboard and palm rest cover so that we can reach to the motherboard.
On visualizing inspection I did not find any burn mark or physical damage.
By using a magnifier glass (very useful tool for inspection) I found power connector pins had dry joints.
Refreshed the solder and powered was turned On the laptop still the same symptom. Hence next step is to test Power Switch on the Palm rest, removed power switch PCB from the palm rest.
Checked power switch with the help of multimeter and found it Ok but here I found dry solder on power switch and cable connector PCB also. I applied fresh solder on the PCB.
I have again connected the Laptop on power to see the result and instantly I got the power indicator light while switching it on through the switch. So I have re assembled the laptop and kept it for charging for two hours to see the final result.
Here previously we are getting Orange Light that Indicates of low battery and in the charging mode hence Laptop is not turning “ON” on Battery. And on getting power from adapter it switched to battery charging mode and after fully charged it turned to Blue. And finally on pressing power switch, I got the display on the Laptop screen.
So for this fault symptom the culprit were dry solder , and laptop is not working on battery mode because battery is not getting charging voltages (19V DC) from the adapter hence it was not charging and battery was totally drained .
This article was prepared for you by Yogesh Panchal who works as a Computer Hardware Engineer in Mumbai India.
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Note: You can check his previous repair articles on LCD Monitor in the link below:
https://jestineyong.com/sony-vaio-laptop-repair/
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Albert van Bemmelen
August 29, 2016 at 2:13 pm
Good job Yogesh!
The owner was probably a lot more careful with their Laptop than owners usual do. In other situations the Mainboard and also the Power Connector would be badly damaged too.
I had to fix quite a few Mainboards and replace a lot of broken of Power Jacks in the past.
Debirt Maynard
August 30, 2016 at 6:51 am
Recently had to work on a relatively new laptop with a similar issue. Somebody took a razor to the adapter before it was brought to me . With a new adapter I still got no power to the laptop which led me to the power connector issue. Great job Yogesh.
Yogesh Panchal
September 1, 2016 at 12:56 am
Debirt,
Thanks for the comment.
Benjamin E.
August 31, 2016 at 8:42 pm
It happens even when you are careful!
My previous laptop, a Toshiba, had a similar issue. All of a sudden I realized something was burning/melting (smelled it), so, as I was using the laptop, I first checked it to see if it was the source. I felt around the laptop to see if it was overheating. It wasn't overheating, but when I brushed against the DC power plug, it was very hot!
I got a slight burn from the metal barrel connector when I unplugged it and felt it ... Doh! I should know better than to not touch suspected hot items.
I took the computer apart and found that they soldered wires to the power jack. The wires were frayed, and the power jack was slightly loose in the plastic molding that it was seated in.
I could only suspect that the loose DC jack made the wires fray over time, causing a high resistance, and thus a lot of heat.
Re-stripping and soldering the wires did the trick! In addition, to prevent a re-occurrence of the problem, I added lots of hot-snot (hot glue) to the connector and the wires. That made it rock solid - No more fraying wires, thank you very much! 🙂
P.S. For a little while beforehand, the laptop would occasionally start blinking it's power/activity/status LEDs in a certain pattern. There were no other warnings or symptoms until the power jack started getting excessively hot.
I searched and searched, but couldn't find out what the blinking code meant.
My guess is that the high resistance caused the voltage going to the motherboard to be too low, thus making it complain (blink a trouble code).
P.S.2. Interestingly, there were some Toshiba laptops that were recalled for catching on fire at the power jack, but my model wasn't included in that recall ...
Go figure! 🙁
-Ben
Yogesh Panchal
September 1, 2016 at 1:00 am
Benjamin,
Thanks for comment.
Yes some time loose connection lead to over heat / Burn because load is try to pull the current .
Yogesh Panchal
September 1, 2016 at 12:55 am
Albert,
Thanks for comment.
you are Right most of the time miss handling of the device is the cause for malfunction.
Paul S
February 27, 2021 at 11:16 pm
Please what is the specifications of the magnifying glass I need
Stanley
August 29, 2016 at 2:28 pm
Thanks Yogesh
Yogesh Panchal
September 1, 2016 at 1:01 am
Stanly,
Your welcome.
Stanley
August 29, 2016 at 2:41 pm
Please I need an advanced ebook on laptop motherboard repair,testing and troubleshooting of laptop voltage and signals. Thanks.
Jestine Yong
August 30, 2016 at 3:07 pm
Hi Stanley,
Sorry I do not have the ebook for the title you are looking for.
Jestine
Albert van Bemmelen
August 31, 2016 at 1:24 am
Sorry if my reply kind of interrupts any of the following Posts especially Jestines, but I hope to help Stanley with his question in a brief reply. Look for the Mainboard voltages active being 3.3V, 5V, and 12V (mostly named as for instance the 5VALS meaning 5V line always active). Which means that if one of these voltages is missing your laptop has a problem in one of the Mainboard powerlines. And then also the about 1V CPU voltage will be missing. And maybe also the Video chip will fail because of it. Look if you can find any modern type of Laptop schematic (about 48 pages schematics and diagrams long) that will help you were to look and understand how a Laptop works. And of course also check if the Input voltage of 18.5 to about 20V DC is available on the Mainboard Powerjack. And good luck with repairing these devices.
suranga bandara, Suranga Electronics
August 29, 2016 at 6:00 pm
Hi, Mr- Yogesh,
The quick trouble shooting you have done.
good Repair.
Yogesh Panchal
September 1, 2016 at 1:03 am
Suranga,
Thanks for comment.
David
August 29, 2016 at 7:06 pm
Awesome repair!! I will look for dry joints next time I get a dead laptop. Usually, I would just replace the mainboard.
Yogesh Panchal
September 1, 2016 at 1:07 am
David,
Using Digital Magnifier helps you more.
Parasuraman S
August 29, 2016 at 7:15 pm
Good Job!
Yogesh Panchal
September 1, 2016 at 1:10 am
thank you Sir.
Humberto
August 29, 2016 at 11:41 pm
Wow! Yogesh, what a nice repair you have done. The owner must be happy a lot. Congrats.
Yogesh Panchal
September 1, 2016 at 1:13 am
Thank you Humberto.
eric
August 30, 2016 at 3:42 am
i got Lenovo z500 which come on but BLANK SCREEN. It beeps when i plug in charger. please help me fix it. Thanks
Om Arya
August 30, 2016 at 11:06 am
Hi Eric, By blank screen you mean a black screen without backlight or any type of light am I right? Then It Could be Dead Ram or a Corrupted EPROM bios chip try replacing those. The latter will be a challenge if it is non socketed one, so first try replacing the ram and see if that helps.
Yogesh Panchal
September 1, 2016 at 1:20 am
eric,
Please connect the external monitor to the laptop and see if display is OK on external monitor Than probably LCD panel / LVDS cable or Inverter of the laptop may be bad and for beep nothing related to this problem may be setting in power option enabled for charger connection.
Andre Gopee
August 30, 2016 at 11:20 pm
Nice Job Yogesh.Thanks for sharing.
Yogesh Panchal
September 1, 2016 at 1:22 am
Andre,
your welcome.
Ulises Aguilar Pazzani
August 31, 2016 at 11:41 am
MR Yogesh very patience good job Sir
Yogesh Panchal
September 1, 2016 at 1:22 am
Ulises,
Thanks for comment.
sunday
September 1, 2016 at 2:27 am
Try to remove the bios and leave it for 20minute and replace is it back
mahmoud_tajpour
September 2, 2016 at 3:10 am
Hi Panchal very very good repair you have done congratulate.
Robert Calk
September 2, 2016 at 6:17 pm
Good job troubleshooting, Yogesh.
Yogesh Panchal
September 3, 2016 at 2:47 pm
Robert Sir,
Thank you.
Mark Tembo
September 2, 2016 at 6:20 pm
Thanks for this article Panchal. I have a similar problem and I will try to follow these steps. I have already tried, but I couldn't get it right. I now know that small things can really make your life difficult!
Yogesh Panchal
September 3, 2016 at 2:49 pm
Mark,
your welcome,
you can also test 8 pin Mosfets on power line.
Yogesh Panchal
September 2, 2016 at 6:37 pm
Mahmoud,
Thank you.
Raju varghese
September 25, 2016 at 4:20 am
Nice job yoghesh , thanks for sharing
Mathew Charles Karonga
November 7, 2016 at 11:52 pm
Thank you for keeping us informed