Toshiba 32DT2U1 Power Supply or Mainboard Issue?

[s2h]

Hi,

I have a 32" Toshiba LCD that is just out of warranty. When I press the power button on the TV, the green LED comes on for 5 seconds (no picture) and then goes off. I opened the back of the unit and disconnected the mainboard and LCD from the power supply (PK101V1500I). I applied power and measured the output on the connector that faces the mainboard. I could only see 5V on the 5V pins. The 12V and 24V pins had no voltage. Is this normal? I did a quick check of the caps and could not see any bulging. Can I assume the lack of a reading for 12V and 24V is a power supply issue or is the mainboard required to "turn on" these levels.

Thanks in advance

[budm]

Re: Toshiba 32DT2U1 Power Supply or Mainboard Issue?

The 12v/24v power supply section is switched on by the PWON (PS_ON) signal from the main board when power switch is activated.
Post good clear pictures of the back of the TV and the boards so we can see what we are dealing with.
Are these the boards in the version of your TV?
http://www.shopjimmy.com/catalogsear...oshiba+32dt2u1

[s2h]

Re: Toshiba 32DT2U1 Power Supply or Mainboard Issue?

Yes those are the boards list on the website. They match what I have below.

Here are some photos. Turns out my phone camera is not the greatest. I can take some more.

[randtek]

Re: Toshiba 32DT2U1 Power Supply or Mainboard Issue?

A corrupted EEPROM causes this problem. I have fixed a few hundred of this model for this issue.

[s2h]

Re: Toshiba 32DT2U1 Power Supply or Mainboard Issue?

Thanks for the quick reply. Is this something I can fix myself or do I have to take it to a repair shop?

Better yet is it even worth repairing considering you have seen a few hundred with this problem?

[randtek]

Re: Toshiba 32DT2U1 Power Supply or Mainboard Issue?

If you can find a shop that can replace just the EEPROM, it can be done pretty cheaply. Replacing the board is more expensive, but is also a reliable repair, as the weak EEPROM that fails has been upgraded on new boards. Once the EEPROM is replaced, they seem to be pretty reliable TVs.

[Tvbob]

Re: Toshiba 32DT2U1 Power Supply or Mainboard Issue?

shopjixxy.com has the eprom.

[s2h]

Re: Toshiba 32DT2U1 Power Supply or Mainboard Issue?

Haven't touched the TV in weeks (other than removing the back to take photos) and decided to plug it in. The picture came on and it worked! Used it for awhile. Next day back to the same symptoms (power light on for a 2-3s and then off). Would a corrupt EEPROM exhibit this behavior?

[triplefour]

Re: Toshiba 32DT2U1 Power Supply or Mainboard Issue?

what ever happened with this one?

[s2h]

Re: Toshiba 32DT2U1 Power Supply or Mainboard Issue?

When I first created this thread, I looked for parts at the link suggested. They were out-of-stock so I stored the TV away. Forgot about it until last week. Plugged it in and the set is working fine. We will see how long it lasts. Appreciate the help.

[triplefour]

Re: Toshiba 32DT2U1 Power Supply or Mainboard Issue?

lol the tv that fixes itself after being in storage is a classic. hope it lasts!

[s2h]

Re: Toshiba 32DT2U1 Power Supply or Mainboard Issue?

Lasted 6 weeks and is totally dead now. Just waiting for Black Friday at this point in the game.

Cheers