Question about IBM ThinkVision L170 17" LCD Monitor
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?
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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Posted on Jan 02, 2017
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Jan 21, 2017 | LG Televison & Video
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.
2. Inverter board - even the B+ is good from the power supply, if the fuse, driver transistor, driver transformer is faulty no output to the backlight resulting to black picture.
3. Busted backlight - even inverter board is good but if this is busted resulting to black picture also.
Diagnosing the fault is technical and if you don't have necessary tools and test instrument and can't fix it yourself, I would advice you to look for an experienced technician to isolate the problem.
Hope I helped you.
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