Lenovo li2341twf Monitor - No Power
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Re: Lenovo li2341twf Monitor - No Power
If the shorts is n longer there without the cap, then you can power up the board for testing for now.
C702 is a capacitor not a resistor.Last edited by budm; 08-19-2015, 11:09 AM.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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Re: Lenovo li2341twf Monitor - No Power
You will remove C702, and then you will take the resistance reading bewteen the two solder pads on the board where C702 used to be connected to to see if the low resistance is still exist on the board.
If the shorts is n longer there without the cap, then you can power up the board for testing for now.
C702 is a capacitor not a resistor.
Okay. I desoldered C702 and I still get 2.6-2.8 resistance between those solder pads.Comment
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Re: Lenovo li2341twf Monitor - No Power
Since that cap is more likely to be the Filter cap for VCC of that IC, unless the there is anything else that are connected in parallel with that C702, then the only left will be that IC is shorted.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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Re: Lenovo li2341twf Monitor - No Power
So what are my options at this point? Am I stuck because there is no way for me to get a replacement IC? I would love to keep pursuing this repair in anyway possible.Comment
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Re: Lenovo li2341twf Monitor - No Power
Well, we need the spec of the IC to see which pin is the VCC pin, or you can remove the IC and replace it.
http://nl.aliexpress.com/store/produ...toreId=1771244
or try EBAY.Last edited by budm; 08-19-2015, 01:52 PM.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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Re: Lenovo li2341twf Monitor - No Power
Well, we need the spec of the IC to see which pin is the VCC pin, or you can remove the IC and replace it.
http://nl.aliexpress.com/store/produ...toreId=1771244
or try EBAY.
Is there anyway to "guess and check" for the VCC pin? Can I just replace it with the IC with the one in the link you provided? or will that not work because it is not the same part number?Comment
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Re: Lenovo li2341twf Monitor - No Power
I know it has been a little while but did you ever get the answer to fix the problem?Comment
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Re: Lenovo li2341twf Monitor - No Power
Unfortunately not. I probably still have the disassembled monitor laying around somewhere. I think I ended up desoldering something poorly, probably rendering whatever component useless, became too busy, forgot where I left off and gave up.
Sorry :/Comment
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