Next tv i have is a 32LG7000, sometimes it will power on fine but most other times it stays on a black screen and the backlight goes on then off every few seconds, first day i got it i turned it on and it worked first time but i tested a hdmi in it and if i remember correctly it showed greyed out when i pressed the input/source button as if nothing was connected.. I tried it again last night and it fired up ok so i tested the power board and all values read as they should, Any of you experts out there know what would cause this?? I can post a video if needed but i think i explained the fault well enough there.. :-)
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Re: LG 32LG7000 Fault
Does noone know how i might go about fixin this? This is the second time i've asked and both times got no reply.. I'm not sure how to troubleshoot it properly.. Where do i start.lol ;-) -
Re: LG 32LG7000 Fault
I know v little about tvs but can t tell anything of the problem from your video.
Have you read Budms guide on troubleshooting lcdtvs stickied on this forum.
Intermittant faults are very difficult to troubleshoot from a distance.
You need to test the power board again when it is not working.
It could be the inverter board post a clear in focus pic of both sides, if it is long/narrow
do it in overlapped sections. When it is on try gently moving the boards to see if it goes off. Also when it has been working switch it off - does it always come back on when warm. If so try gently heating sections of the boards to see if it comes on.Please upload pictures using attachment function when ask for help on the repair
http://www.badcaps.net/forum/showthread.php?t=39740Comment
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Re: LG 32LG7000 Fault
If there is a ribbon cable running from the inverter to the tcon try unplugging it.Comment
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Re: LG 32LG7000 Fault
if the tv goes dark ,did you get the soundComment
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Re: LG 32LG7000 Fault
Also i tested all power outputs on the tv, 5vstb, 5v, 12v and 24v all working fineComment
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Hello everyone. 😀
As per thread title, this unit has a serious SMPSU fault. It blows F1001, which is a 10A M205 in the phase from the mains input.
Very first thing I tried, was simply replacing the fuse, but the replacement ceramic fuse blew immediately.
Looking at the schematic for this PSU, I then removed what I thought was the next likely candidate: D1001 - the HV main bridge rectifier.
This isolated the fault(no longer blows the main fuse), but does not point me to the actual fault.
There are no devices that have exploded or otherwise show signs... -
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I would check what my multi meter was telling me about how many ohms I getting with the multi meter was telling versus the ESR was telling me about weather or not it really was a short to machine ground or not
One note at first we thought that it might be a bad I/O card or a malfunction PLC including me as well but I thought I would try and see if removing the I/O cables would make a difference or not and this time it did make a difference... -
Hello,
I have a strange fault with a Lenovo ThinkPad E14 G2 (Board No. NM-D011 Rev. 1.0).
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As you can see from the pics, the offser is the same (just multiplied for other rages):
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-0.49 mA
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Hi all
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