Motherboard HP-COMPAQ Repaired
This Motherboard HP-COMPAQ was given to me and the complaint was no video out
As you can see in the photos below there were four bulged e-caps.
Bulged e-caps are commonly found in motherboard that have problem.
The four bulged e-caps were removed from the circuit and substituted for similar ones.
The values of these e-caps were the following:
- 3330µF/6.3v (one).
- 1500µF/6.3v (two).
- 1000µF/6.3v (one).
Once this Motherboard was inserted back into the cabinet and powered ON, there was video out (display).
This article was prepared for you by Humberto Rodriguez, one of our ‘Master Authors’ from Cuba.
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Corriete
March 24, 2015 at 9:31 pm
simple but great job in keeping from the dump. thanks for sharing
Humberto
March 25, 2015 at 7:21 pm
Ok Corriete, UR right
Robert Calk
March 24, 2015 at 10:41 pm
Good job Humberto. Thanks for taking the time to share your article with us. I like your new photo btw. lol
Humberto
March 25, 2015 at 7:34 pm
Thanks Robert.
Yogesh Panchal
March 24, 2015 at 11:51 pm
Good job thanks for sharing.
Humberto
March 25, 2015 at 7:35 pm
Thanks Yogesh
Merlin Marquardt
March 25, 2015 at 12:34 am
Good bad caps repair.
Rudi Wijaya
March 25, 2015 at 12:59 am
Nice repair sir !
It's quiet hard to get the caps out of the motherboard and that need at least 60watt soldering iron, may I know what type of soldering iron you use to desoldered the caps?
Humberto
March 25, 2015 at 7:26 pm
Hi Rudi Wijaya, I simply use a 40 watts soldering iron to desolder and re-solder the e-caps. Of course, with a cleaned and thin tip
Edder
March 25, 2015 at 7:34 am
Good you help me by providing me a service manuals for a soyo monitor VT19N79
thanks for your help
Humberto
March 25, 2015 at 8:47 pm
Sorry Edder but I do not have this service manual
Peter O
March 25, 2015 at 8:15 am
That's about as simple as it gets.
Maybe you over simplified & checking other components took longer.
Also a bit surprising that 4 caps was the only replacement needed.
Hope we can all be that lucky!
Thanks for sharing.
Humberto
March 25, 2015 at 7:33 pm
Well Peter O, I own a Blue ESR Meter, and of course I've tested the rest of the e-caps of this MB. Sorry I forgot to say this in the article.
Mohammed Kasim
March 25, 2015 at 11:57 am
It will be useful if you can explain how capacitors are removed and soldered back. Any tips while removing capacitors from motherboard
steven neo
March 25, 2015 at 2:52 pm
you can try this item .... this may help
http://www.aliexpress.com/item/T004-New-Details-about-220v-Electronic-Desoldering-Pump-Solder-Sucker-Removal-Iron-Vacuum-Tool-Repair-FREE/1722186983.html?s=p
Humberto
March 25, 2015 at 8:07 pm
Thanks steven neo and Mohammed Kasim, I do not have an electronic desoldering pump, so I use an ancient method with a soldering iron and a thin steel wire. If Mr. Jestine Yong allows me I could do a video of this method for showing everybody how I perform this. I'll be waiting for the answer.
Robert Calk
March 25, 2015 at 10:52 pm
A video would be good - but an article that is well explained with good pictures would probably suffice. But I'll leave that up to you whether or not a video would be better.
I used that method before when I was having trouble and I didn't even know there was a name for it. I think I used a cut off lead from a 3 or 5 watt resistor, but I don't remember exactly. It was before I had a decent camera and started writing articles. I didn't have a Hot Air Rework station then either.
But I can't wait to see it whether it's a video or article!
Humberto
March 27, 2015 at 1:10 am
Ok, I'll contact to Mr. Jestine Yong, and he will say me if one of them (video or article) or both of them. Ok?
Robert Calk
May 15, 2015 at 3:44 pm
Even after 2 months I would still like to see the article...
Mohammed Kasim
March 25, 2015 at 11:37 pm
Thanks for the replay
We hope Mr. Jestine Yong will be happy to hear this.....
Jestine Yong
March 26, 2015 at 7:40 am
Hi Humberto,
You can set up a free youtube.com account and upload your video. I will get the embedded code and post your video into my blog.
Jestine
Donna
March 26, 2015 at 4:13 pm
Hmmmm, typically the cause for "no video output display" is not bad caps, but rather a degraded SMT solder connections on the GCU CHIP, which is not repairable without a SMT machine. (There are hack repairs that will earn you a few $$ but they rarely last 6 mos, and when clients figure out they've been burned, your reputation is destroyed)
So it's a nice article and everything, but someone is living in a dream world here. Caps rarely go out on the newer machines...the old XP age desktop computer motherboards, but not laptop system boards...so I'm a little skeptical of the entire article, sorry. Been a tech too long, and it doesn't line up at all ...IMO.
babaganatijjani
March 26, 2015 at 5:58 pm
Thanks. My sely and my boys we are all great in nigeria
Albert Hoekman
March 26, 2015 at 11:42 pm
Humberto, good job.
Because I repair computers and other digital equipment, I woud like to share som more information about e-caps for pc motherboards.
The most important thing for e-caps in computers is the temperature that is written on the e-cap. This should be 105 degrees Celcius. The 105 degrees means that the working temperature of the e-cap is 85 degrees Celcius. That is mostly the temperature inside a computercase used for heavy work like HD-games and video-rendering.
Good brands of e-caps are Yageo, Teapo, Sanyo.
Humberto
March 27, 2015 at 8:34 pm
Ok Albert Hoekman I agree with you 100%.
reza
March 27, 2015 at 5:29 pm
hello mr Rodriguez
thank u for sharing this good article.
by
Humberto
March 27, 2015 at 8:46 pm
Thanks reza
masoud
May 15, 2015 at 2:56 am
your article is very good.thank you very much.
stephen ngechu
June 2, 2015 at 4:01 am
hello sir, it's a well come development. you've make a common man to grow in electronic repair worldwide with yours useful information on elctronic repairs. sir, keep it on. I appreciat. Thanks