When the TV is turned on it will show the splash screen (Coby's symbol or whatever) for about a second before going black. The screen is completely black. There's sound, the menus work, I managed to switch video source, but still no video or the menus. The standby light is on when the TV is off and glows brighter when turned on before ultimately turning off completely when the black screen comes. I have inklings of what's wrong, but I'd appreciate some outside input.
Looks like you might have issues with your screen it self the lights and all internal issues. You might have to take into a repair shop to get it done, a fuse might have been blown up. If you have warranty try to take it in and get it fixed.
SOURCE: My Coby 40 inch HDTV wont turn on. The blue light
I had a 32" Coby that did the same thing, turned out to be a defective main board. The main board wasn't sending the 3.3v signal to wake up the power supply. In my case I sold the tv for parts because it wasn't cost effective to replace the main board. It sound like your main board
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.
SOURCE: My coby tftv3229 wont turn on and I've only had it
Coby TV only Flashing it's logo , and will not turn on, not working.
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