42" Magnavox trouble

[nomoresonys]

Re: 42" Magnavox trouble

ok, did you check the fuse or fuses may be more than 1, on the tcon board?

[Larry1988]

Re: 42" Magnavox trouble

nomoresonys i could only find 1 fuse that i could see on the t con board labeled fp1 and it reads 000 in diode mode

[Larry1988]

Re: 42" Magnavox trouble

bump feel like it might be better to abandon this set for the sheer fact so many have not fixed these sets ?

[piddler]

Re: 42" Magnavox trouble

Thought I would try to revive this thread since I have this exact TV. It has the notorious two seconds to black. My question is concerning the Inverter power supply board. There are pins marked 345v. When I test those, I only get 160v when i power on the TV. If im reading the service manual right, It needs to send the 345v over to the main board. The backlights briefly turn on and then the TV shuts down. If I unplug CN1803 that runs to the actual backlight inverter,the TV doesn't shut down. I bought a used inverter board off of ebay. No luck! Still two seconds to black. Im thinking the inverter transformer on the power supply may be shorting when a load is put on it. But I dont know much. just like trying to repair junked electronics. Any advice and guidance would be appreciated Thanks.

[tvtimmy]

Re: 42" Magnavox trouble

Alot of times a bad transformer will give you the "2 sec. to black" condition. Use an old bulb laying over the transformers or the small blue caps then turn on tv and watch for the bulb to glow on where there are caps or transformers. If you see a pattern and one part of bulb is not lit its a bad transformer. If they all light up the bulb, you may have a bad bulb in your set. There will be a blackness at the ends of it.

[piddler]

Re: 42" Magnavox trouble

Thanks tvtimmy. I'll give that a try when I get home. What type of bulb? A CCFL? Or can I use another type? I don't have another CCFL to use.

[budm]

Re: 42" Magnavox trouble

Can we see good clear pictures of YOUR boards and the whole back side of the TV?

[piddler]

Re: 42" Magnavox trouble

Update on my progress. I found a reasonably priced power supply board so I gave it a shot. Installed it, TV powered up and stayed on! I thought, well that was worth $40 bucks. Stayed on for two hours, then shut down! Same situation as before. 2 seconds to black! I may have to take up drinking!

[piddler]

Re: 42" Magnavox trouble

I will get some photos posted this afternoon Budm. Thanks

[piddler]

Re: 42" Magnavox trouble

Hope these will work