What board should i replace on DP50749 if i have sound but no picture

Fault to its main board. Short circuited component/s at it. Contact any service technician; or the authorized service center.If you wish to get some details; check the site linked here.Surf the site with patience.Pull up older posts.http://electronicshelponline.blogspot.com/ .In most cases, the main board might have to be replaced.If so, a software [firmware] update too might be necessary.

Sounds like main board fault. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. http://electronicshelponline.blogspot.com/ . In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.
Type in the brand name of your device, in the search box [at the top right] of the display window, and press enter to get all related posts. It will make surf easy.

Fault with main board. Damaged component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. http://electronicshelponline.blogspot.com/ . In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.

This is likely a heat issue, and the CPU of the tuner is instructing the power board to switch it off for reasons related to over heating. Check that a fan ventilation improves the problem. The solution is not easy but maybe adding a fan to the tuner CPU can fix this issue.

There are number of things that can be bad and what's more there are number of very different Sanyo DP50749 models which have rather different internals and different known issues.

What you need to find out first is the chassis of the TV, which is going to be on the back label, something like P50749-00 for example, and supply that too.

Here's a link with offer for parts and repairs we have for DP50749 - again, be advised that those may be for practically very different TVs internally and the first thing you need to do is find out what is yours! :

http://www.coppelltvrepair.com/search?Q=DP50749

Hope this helps!

Here's what you probably need for a DP50749 startup probelm:

http://www.coppelltvrepair.com/search?Q=Dp50749&As=false&Pf=&Pt=&Sid=false&btnsearch=Search

Of course bear in mind it may as well be a bad sustain board, for example - that's another popular issue for DP50749.

Less commonly, but the power board may be bad too.

Change input device to some other like a DVD player and see. Check for loose contacts in power outlet, RC cable, jack and socket.

I see so many here with no sound/nopicture issues:

ISSUES:

1. IF sound main fuse/s are good.
2. If no power or standby check main fuse, standby power supply and any signsof damage you can see---burnt parts etc.
3. almost all these sets the troubleshooting involves checking voltages on the main power board to narrow down theproblem.
4. Be safe and if you do not know what you are doing don't open the set.

Answers to issues:

1. RE:fuses---if a blown fuse is found get a good replacement(not the genericones like Radio Shack). Many fuses are special even aside from amperage--Don'tput a higher rated amperage fuse in the set for any reason.

2. RE: power supply in set: if total dead aside from main fuse the set uses astandby power supply that runs 7/24 and a main supply (some are combined andsome not.

Here aside from checking fuses you want to examine all the filter caps on thepower/standby to see if any are puffed up or buldged up in some fashion--Iattach a photo of a good one---top should be silver metal and PERFECTLY flatand have no brown material coming out on top or bottom.

What happens in the standby area is they use caps with too low a voltage rating(saves money) which causes them to fail in a year or two---the standby runs7/24 and the heat dries out the caps and they fail.

3. Trouble shooting consists of the above and then at some point you have to buyand try a board to see if it fixes it or not.

4. Safety first--no TV set is worth getting injured or even killed over.If set is opened at least look for puffed up and bad caps like in thisphoto.

Main board is most likely but that is an educated guess--problem with all these is you can only check so many things and then have to guess and try a board.

There is your manual and you should be able to buy a universal remote to replace the one it didn't have when you purchased it.

Good luck.
Semper Fi,
Z

Sanyo DP50749 50 Plasma TV Manuals