Question about IBM ThinkVision L170 17" LCD Monitor

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17 inch IBM Thinkvision

I got a 17 inch ibm and when i turn it on it shows the logo and then it goes black. i took it apart and everything seemed to be ok. I was thinking maybe the LF 4a fuse may be gone. But if thats not the case how would you go about this , like how would i test the capacitors or anything. I hope you can help me my grandfather is on my case right now.


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  • tylermt Oct 10, 2008

    ok so what is a good way to test like on what setting because i got a meter but have no idea on how to test the caps ....

  • tylermt Oct 10, 2008

    lol that sucks there like 100 bucks....

  • tylermt Oct 11, 2008

    OK thanks man so you think its caps if there is no power what so over on the monitor? it makes a low buzzing noise. i appreciate ur hep though man.

  • tylermt Oct 11, 2008

    um no i ordered new caps for my benq so i tried the cap on my benq and put it on this ibm and it was to many volts so the screen was really bright the inverter light actually came on for split second now i was wondering may it just be that type of capacitor or is something else may be blowing it out?. The capacitor i tried was a 1000uf 16v and the one i replaced was a 1000uf 10v.

  • tylermt Oct 19, 2008

    i just ordered all new capacitors for my ibm i will let you know on the outcome i apreciate ur help fix



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My ibm 17" lcd light is on but it is working

Posted on Oct 19, 2008

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Well... a good way to tested the caps is to used a Blue ESR meter.

Posted on Oct 10, 2008

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  • Cj T
    Cj T Oct 10, 2008

    Well...meter with setting it not for testing capacitors and not giving a true read out. A good caps meter is made by Ana Tek Corp. called Blue ESR. It's design for one thing testing caps.. and there no settings...just clips or points and will give you the read out... very useful piece of tool!

  • Cj T
    Cj T Oct 11, 2008

    Well...the regular meter you had is useless... So, don't bother... You've got more chances...just by guessing it. Hehehe... Here a simple ways to find out if your caps are bad. By looking at the top of each caps for bulged or fluids leaked. Find any of those, then replaced it...not sure, just replaced all of them...:) Couple of caps only cost you about $10 bucks! Much cheaper this way.....Hehehe...

  • Cj T
    Cj T Oct 11, 2008


    So, does your Grandfather monitor had a AC Adapter? It may be the caused too... if you've got one.

  • Cj T
    Cj T Oct 11, 2008


    Well, it have to be the same volts as your old one... or it will blowing out...



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2 Answers

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Hi you can inspect that what's wrong with your monitors. After you turned it on and the screen went black, you have to check that if you can see the image on the screen or not by shining a flashlight into the screen, not directly but find the best angle to the screen and take a look very closely. If you can see the icons or any image, there will be a minor problem. This is because of the lamps inside screen. Some of them were broken and it is very easy to replace. If you cannot see anything on the screen, there'll be some problems with inverter board. If you have soldering tool and want to fix it by yourself, check the caps first. It may cause this problem. Some caps might show leaking or burn spot on the board because of too high temp. If you don't have soldering tool, you better go get a technician to do so. Hope this help!! If anything I can help you with, feel free to let me know.
Thank you,

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