Fixing an LCD Televison (Toshiba Regza 32lh67)

I was just given a problematic Toshiba Regza 32hl67 with a power on problem
As soon I plug in the TV it tries to turn on and it will turn on and then turn right back off (Within the matter of 10 Seconds) the same thing happens if I press the power button during that sequence (Which does nothing) I see a yellow LED that flashes 3 times and a green LED on for about 3 seconds (The whole sequence is about 10 seconds)

I took the back off the TV and I don't see any bulged capacitors (Can a capacitor be bad with out looking bulged?)

PS the TV will go through the sequence until it is unplugged and will immediately start over if plugged back in
Thanks

 

Yes caps can be bad with no physical sign. This could be a standby power problem. If you have a meter , I would check the +5v and +12v section of the power supply.

 

I found a similar TV on eBay (With a cracked screen) the person was selling all of the circuit boards in one lot for the same price that I could of gotten just one board for so I bought it and I replaced the power supply board and now the TV works great

 

That's great! It's amazing that you were able to find a deal like that in less than two weeks.

 

It sounds like you have the same issue as my one tv.
After a brown out, it started acting up the same way (is an LG 42" Plasma). It was two caps that are done on the power board. I've been repairing hand-me-down electronics for years, so it was pretty easy to spot and then confirm.

I'd suggest taking a minute to look over the boards again. If it's anything like my LG, you should be able to trace (visually) where the power comes in, and then to the power board where it is modified to suite.

Here is a pic of my blown caps (the two 3300uF 10V caps). Repair costs was $5.26 for the two caps (and two spares) delivered to my door via snail mail and beer.


Here is the layout of the TV electronics. The quality is poor as my cell phone was almost dead and refused to allow the flash to go off. The power plug is connected to the lower point of the red/blue wires (center). Followed that through and found the bad caps on the upper middle board, in the lower right corner (hope that makes sense).

 

Thought I would post a quick follow up on my TV repair.
Replaced the two 3300uF caps and it was up and running.

To the OP, take a look at the board you replaced. It may be easily repairable and if so, you could turn around and ebay it and get your money back.

 

My toshiba acting the same way. Put in new power supply-still turning off and on with no response. Put in new main board- same result. Bought used seine board and TV works correctly now. Replaced both new boards with the originals and everything is working right. Turns out that the seine board was bad. Hope this helps someone else.

 

Yeah I got my TV to work almost two years ago but I gave the TV to a friend and my "Fix" only lasted a month so the TV died July 2012 and my friend gave it to someone else and they did a board level repair (Which I could not do as I suck at soldering) and the TV is still working to this day so much for me fixing flat panel TVs when ever some one asks me to take a look at their TV I decline (Unless it is an obvious not hooked up correctly or an menu setting that they did not know about, but the actual boards inside I refuse to touch now)

By the way what is a seine board

The only LCD boards I am aware of is

1. Power Supply
2. Main Board
3. Inverter (If backlit by CCFL's ans not LED backlit)
4. T-Con (The Panels Timing Controller)
5. Any other accessory boards like IR Board Input block