Sanyo dp42849 black screen
I have a sanyo dp42849 and the picture stopped working. The power light is on but the screen is completely black. Not sure if the audio works or not but I think that it doesn't work too but like I said im not sure. I did some research and I found that it may be the power supply board and to check the capacitors. I looked and they seem fine. So I am not sure what else I should check for or if it is just the whole power supply that is fried and Mabie I just need to replace the whole thing.
Andrew Johannis, besides the most common error being on the power board, also check the caps and fuses marked F1 and F2 on the inverter board.
I added the flowchart from the service manual. you did not tell us if you have anything on your TV in respect to blinking LED or anything. So start with this flowchart, it is hard to see as an image on here but works if you print it out. ...Hope this helps, good luck.
Power supply is rarely bad in Sanyo DP series and that sure includes DP42849.
They have two popular problems: the main board and the inverter boards.
The main board can fail in different ways and result in different failure symptoms.
I'd say wait a little longer to see if the TV remains on (front LED lit) or does it cycle every 30-40 seconds.
If it stays on and doesn't cycle then most likely the main board is OK and you're looking for new inverters.
If it shuts off (front LED off or red) or if it cycles every so often then it's probably the main board.
Note the DP42849 comes in several different releases, all different enough to each other to actually NOT be appropriate to refer them to as "DP42849".
You need to know the exact chassis model of your TV (e.g. P42849-00) and look for that to be certain you'll find the part your actually need.
Better yet, open the TV and look inside for actual part numbers...do NOT rely on what Internet is throwing at you because more often than not it will NOT be what you will need.
For more see here:
Hope this helps!
Please send me the links to the Service manual and T-shooting manual. I have the blank screen as well. replaced the power supply.
I hear a very low hissing sound from the power supply--is that just the voltage sound? the green power light is on steady.
Sanyo DP42849. it takes the 1500/1501 board not the 1701.