If TV comes on (front LED gets green and stays green) then the problem is NOT in the power board.
It may be in the inverter or the main board, no easy way to tell, but you can measure the voltage on the inverter and see if it gets power.
if the front LED gets on for a short while and then turns off then the problem is most likely in the main board 1LG4B10Y04600.
Here's where you can find a replacement (repair also available for a bit less):
http://www.coppelltvrepair.com/p/97/1lg4b10y04600-main-board-for-sanyo-dp42840-exhange-service-buy-a-working-board-and-send-yours-for-credit
Further, if the front LED does not come up at all then the problem is in either the power or the main board; first check should be if the power board supplies the +5V standby voltage to the main board.
Coppell TV Repair offers repair services for both the main board and the power board, by the way, although the power board can probably be found rather cheaply on ebay...at least as of today.
Hope this helps!
Check and replace its power supply regulator board. Seek tech support.
SOURCE: My sanyo dp42840 flat screen
The first thing I would check would be the electrolytic capacitors on the power supply board. If any of them are swollen or domed on top rather than flat, they will need to be replaced and that will fix your problem. I fix about 75% of them at the shop by replacing caps on power supply. A tech will probably charge around $100 if it is bad caps. It is a fairly easy job.
SOURCE: Sound No Picture Sanyo LCD WIDE Screen HDTV
Hello heck75,
I wrote this for another post but it applies here also:
This sounds like your inverter or back-light has gone out. What you can
do to test this is to turn the TV on and then turn off all of the
lights until the room is dark. Then shine a flashlight at an angle on
the screen and see if you can see a picture. If you can the back-light
and or inverter has malfunctioned. If this is the case, then I would
suggest that you have a qualified TV technician fix this problem, but
first ask for a estimate because the inverters and back-lights are
sometimes part of the screen and is it is you might as well buy a new
TV.
If the inverter is a separate board, If you have a background in electronics you might be able to repair the board, however if you do not have a background in electronics, again I would suggest getting a qualified TV technician to work on your set.
I hope this helps,
Thank you,
Shuttle83
Electron-Age Technologies LLC
www.electron-age-technologies-llc.com
SOURCE: Is the Sanyo LCD HDTV Model DP 42647 a 1080P tv or not?
hello,
this tv is 720p heres a link to your manual info
http://tv.manualsonline.com/manuals/mfg/sanyo/dp42647.html
hope this helps
SOURCE: Just purchased new Sanyo 42"DP42840.
Being a new set it is important that you should have tested the model to your liking in the showroom. However some of these models have poor sound as the sound is normally fed into the home audio system. So if you have any audio system connect the audio outputs to the auxiliary and you will be able to get better sound.
Other wise you need to check back at the showroom if the same model sound as same as yours. Otherwise exchange the set under warranty.
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