Question about Sharp Aquos LC-37GD6U 37 in. LCD HDTV
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Posted on Jan 02, 2017
SOURCE: have a 30" SHARP Aquos LC30HV2U that has a bad power supply. Nothing happens when I turn on the LCD - though it is getting power confirmed by green light going on but nothing on LCD. Visual inspection
You did try the CLEAR button on front of the box?
One possible idea is the cables going the box to the TV. ( might be bad )
If your sure about the problem, you can get your Service Manual here:
This with have all the schematic, diagrams, part number, and test points you need.
Posted on May 17, 2009
Buy the green light going on means Standby is ok. Next, would be to locate the plug coming from the main board to the power supply and find the post that says PO which means power on. With your meter on that post, press the power button as see if the reading goes High, if it does then the main board is able to turn on the power supply. Next, find the plug on the power supply that goes to the inverter( the long board on the side) remove it and see if you have 24 volts coming out of the power supply when you press the power. If you do, then the inverter board is bad, if you don't have 24 v, then the power supply is bad. There are NO diagrams available for these set other than a flow chart if you can find one. A regular svc tech does'nt need a manual for these anyway.
Let me know how you do Kathy ?
Posted on May 17, 2009
SOURCE: sharp aquos lc-37d43u tv
I've read online that upgrading to the latest firmware sometimes
resolves this issue. That's kind of shooting in the dark though - I
personally would not feel completely confident that a FW flash would
actually resolve the issue (as it could still be lurking beneath
somewhere, waiting to surface again). If you have no warranty, then
the FW flash is not a bad option. It's relatively easy and virtually
impossible to screw up!
Another option is to order a replacement (new or used) main power board, and swap it into the TV (or pay someone to do it). It seems the power circuit board is a common culprit for this issue. If you're a do-it-yourselfer, then open up your TV and see if you can tell which component is failing, then hit eBay for a replacement:
However, if you're still under warranty, then I imagine you've figured out by now that your best bet is to contact Sharp to fix this issue. Mine was luckily under the extended (15-month) factory warranty when this started happening to me. I was 13+ months out from date of purchase. Sharp support confirmed a tech needed to come out for an all-day appointment to troubleshoot the TV (I have the monstrous 65" Aquos). Thank goodness for the extra 3 month warranty I got when signing up for the Aquos Advantage club! Otherwise, my $3400 investment might have cost me at least $700-$800 to stay online - only ONE year out from purchase! If I would have known about the frequency and common nature of this problem, I would not have hesitated on buying the additional 3-year protection during my first year as an owner. Now I know to research product defects a bit more before opting out of a warranty for a multi-thousand dollar purchase!
In any case, I'll post the root cause of my issue (same symptom - OPC and power lights flash three times, then pause, and repeat indefinitely until TV is unplugged), once the Sharp tech leaves my place this coming week. Keep in mind that my root cause may not be the same as yours, even though the error codes are the same. :)
Good luck with your issue!
Posted on Dec 27, 2009
SOURCE: Power supply in my Sharp
The common failure in the power supply is due to cheap low quality capacitors, the replacement that was install probably has the same quality cap. I only use good cap from PANASONIC for my repair works.
The moudle is easy to replace, just remove the TV stand, all the back screws, and may be 4~6 screws for the power supply, it uses connectors so yoiu can easily remove them, just take good pictures before working on it so you will know how it goes back together.
You can try getting the module from www.shopjimmy.com, he is my main supplier for boards.
Just make sure to get the number as printed on the sticker of the power supply to get exact match, you can also contact him if you are not sure.
Here is the service manual: http://elektrotanya.com/sharp_lc-32_37d43u.pdf/download.html
Basic LCD monitor and TV troubleshooting guide:
Failed TV and Monitors pictures: http://s807.photobucket.com/albums/yy352/budm
Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague
Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps.
Or www.digikey.com, just make sure to use caps with low ESR, 105c, high ripple current and long life rating such as PANASONIC FM or FC series
Posted on Jun 14, 2011
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