Question about IBM ThinkVision L170 17" LCD Monitor

2 Answers

IBM LCD Monitor Model # 6734-ABO

Hi! How are you? This monitor was working perfectly when suddenly, No picture... Like the other posts pointed out, You can shine a flashlight at the screen and see the image, so something is wrong with the backlighting circuit. Now I have to assume that "caps" is an abreiviation for capacitors... There appears to be one board for graphics rendering and one dedicated to backlighting. I am an auto mechanic, not an elecs tech, but I would think if the problem were the back light bulbs, then all of them would not fail at once, correct? I have looked for a fuse in this unit and found nothing that resembles a conventional fuse anywhere. Is there a schematic available anywhere for this unit? What would the fuse look like? Which capacitors are responsible for the backlighting circuit? Thank you very much. Would just buy a new unit but am totally broke.
Adam Drennen

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  • greatfull Oct 23, 2008

    same problem have you found a solution yet?

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2 Answers

How would u test the capacitors on what setting?

Posted on Oct 04, 2008

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  • 293 Answers

Adam,

Well, to look for a bad capacitors you need to tested with a ESR meter. But if you are lucky sometime you can spotted just by look at the top of a caps for stress mark (like it going to burst out). The caps look like a tiny battery, other look like a blue button with 2 pins. Sometime it not the caps problems...it's beyond repaired. Anyways, good lucks!

Posted on Oct 03, 2008

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Posted on Jan 02, 2017

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1 Answer

Vaio LCD problem


Periods.......Nice little items because they denote the End of a sentence.
See how this works?

"I have a vgn cs36gj, I was working with it, suddenly the LCD became pale black, I connected it to external monitor and it has a picture, sometimes after turning on for 30 minutes LCD start working normally, but after turning off and disconnecting power when I turn it on, it only shows a pale black picture, you know it is on but only black!"

Now you try it.........

"I have a vgn cs36gj. I was working with it, suddenly the LCD became pale black.
I connected it to external monitor and it has a picture."

Okay, I got that part.........

"sometimes after turning on for 30 minutes LCD start working normally, but after turning off and disconnecting power when I turn it on, it only shows a pale black picture, you know it is on but only black!"

WHICH LCD?
Laptop LCD?
External monitor LCD?
Man on the moon LCD?

1) If the external monitor LCD goes 'pale black', the problem is the graphics chipset.
This I do not believe

2) If the laptop LCD goes pale black, this I believe.

Post back in a Comment.

Regards,
joecoolvette

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1 Answer

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i had the same trouble i changed 2 capacitors on the power supply board a 470uf at 25 volts and a 1000uf capacitor 25 volts.look for any capacitor where the top is bulged and replace them. my monitor works great again.

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1 Answer

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Sounds to me your high voltage powersupply is out. To repair open monitor and remove high voltage powersupply. Inspect the caps on the board. Look for the ends of the caps to be mushroomed out. Replace these caps, usally 470 uf caps. Replace with 25volt caps. Might also be some 100uf caps as well. This is a common problem with all LCD monitors.

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AnBparts ebay store is very helpful.

They have this IC in small qty.

I've made several purchases from them and they are very reliable.


Here's a link:
http://cgi.ebay.com/AO4600-4600-POWER-MOSFET-INVERTER-PARTS_W0QQitemZ370160819357QQihZ024

Thanks,
Chris
Boise LCD - monitor repair
www.BoiseLcd.com
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Try a replacment monitor from a family member or friend. If their monitor works ok.....then your due for a replacment. The are very little user servicable parts inside.

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