Question about IBM ThinkVision L170 17" LCD Monitor

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Backlight not working on the ibm lcd l170

It flashes when i turn it on.one flash and no more.i know its inverter.but instead of transistors it uses some chip(two of them),it has 8 legs,4 on one side are soldered together and that lead goes to transformer same on the other chip , and other side of chips have 1 leg 13V+,one is 13V ground,one is blank and one is +5v i suppose this could be an oscilator chip,but i am not sure...
i cant read what it says on him because it is fried...with what should i replace them?could that be an ordinary n555 oscilator?

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  • kenny258 May 11, 2010

    What control IC on it (BIT3105 ?)

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Check here may help you "http://www.fairchildsemi.com/ds/FA/FAN7317.pdf"

Posted on Nov 02, 2008

I dunno what ic,because it burned and i can't see the markings!!!

Posted on Oct 31, 2008

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Hi doubles,
Power on the unit in the dark room then shine with the flashlight directly in the screen, you will barely see the images. This is because your backlight is not functioning. The following reason is the caused.
1. Power supply - missing B+(supply voltage) coming from this board feeding the inverter board. This is caused by faulty transistor, dried/leaky electrolytic capacitor, open fusible resistor.
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3. Busted backlight - even inverter board is good but if this is busted resulting to black picture also.
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Jan 22, 2011 | IBM ThinkVision L170 17" LCD Monitor

1 Answer

IBM Think Vision L170 Monitors. I have a couple with the same issue. Power them on, and the IBM logo flashes for a second, then a blank screen. The indicator LED is green. Powering off/on doesnt...


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IBM THINKPAD


Hi...there,

It's seems your Thinkpad need a new inverter, due to a backlight inverter burnt out. Get a new one or repaired it. Good lucks!

Sep 06, 2008 | IBM ThinkVision L170 17" LCD Monitor

2 Answers

Monitor wont turn on, green power light on


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,

Mar 08, 2008 | IBM ThinkVision L170 17" LCD Monitor

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