Toshiba 40e210u - no picture/sound

[wezo]

Hi all. My daughter's Toshiba 40e210u LCD quit working. She described the anomaly as an orange line going across the screen and the picture going blank, like lights turning off. Now when I power on, the power light comes on, the back-lights turn on, off, on and then dim; all in about 7 seconds. It turns off after approximately 14 minutes. I also see red light coming from the Digital Audio Out connector. Following are the voltages from P802, lower left in power supply photograph; pin 1 at bottom (power supply to main board connector).

pin - name - off - on
4 - 24Vcc - 0 - 24
9 - 12Vcc - 0 - 11.91
11 - 5Vcc - 5.12 - 5.11
13 - PWON - 0 - 3.32
14 - ACD - 0.03 - 0.02
15 - DIM - 0.01 - 0
16 - BLON - 0 - 3.3

[mmartell]

Re: Toshiba 40e210u - no picture/sound

Sounds like a tcon fault maybe ? Check the tcon fuse.

[wezo]

Re: Toshiba 40e210u - no picture/sound

Thank you mmartell. Would a fuse be designated as fp01? I am not familiar with surface mount terminology.

[mmartell]

Re: Toshiba 40e210u - no picture/sound

Might be. Post a picture of the board.

[Andrew F. Ali]

Re: Toshiba 40e210u - no picture/sound

With the DMM set to 20Vdc and the BLACK -ve probe attached to bare metal of chassis measure the voltage on each end of FP01. If it is good you will get a voltage reading of 5 or 12V on each end. If it is 'open' you would get 5 or 12V on one end and 0V on the other.

[wezo]

Re: Toshiba 40e210u - no picture/sound

Might be. Post a picture of the board.

I was not at home when I asked. It is posted now.

[wezo]

Re: Toshiba 40e210u - no picture/sound

With the DMM set to 20Vdc and the BLACK -ve probe attached to bare metal of chassis measure the voltage on each end of FP01. If it is good you will get a voltage reading of 5 or 12V on each end. If it is 'open' you would get 5 or 12V on one end and 0V on the other.

Thank you Andrew. That was a good call. It is blown!
Any idea what would have caused it to blow?
Where can I get the part?

[Andrew F. Ali]

Re: Toshiba 40e210u - no picture/sound

Do you have any soldering skills? With the TV powered off and unplugged from the 120Vac, using the same DMM set up only this time instead of being set on 20Vdc set it on the Diode check. If there is a short on either side you would get 000 or OL reading on the display. If however both sides read 1 then depending on your soldering skill using a VERY THIN strand if wire and solder it to bridge the fuse FP01. Power up the TV. If the TV works get a replacement fuse. If it pops then replace the T-CON Bd.

[wezo]

Re: Toshiba 40e210u - no picture/sound

Do you have any soldering skills? With the TV powered off and unplugged from the 120Vac, using the same DMM set up only this time instead of being set on 20Vdc set it on the Diode check. If there is a short on either side you would get 000 or OL reading on the display. If however both sides read 1 then depending on your soldering skill using a VERY THIN strand if wire and solder it to bridge the fuse FP01. Power up the TV. If the TV works get a replacement fuse. If it pops then replace the T-CON Bd.

Thank you again Andrew! Yes, I would say my soldering skills are really good. Neither side is shorted, so I am going for the bridge and test. Well, the wire did not pop and have 11.92 vdc on both sides, but I still have no video nor sound.

[wezo]

Re: Toshiba 40e210u - no picture/sound

Thank you again Andrew! Yes, I would say my soldering skills are really good. Neither side is shorted, so I am going for the bridge and test. Well, the wire did not pop and have 11.92 vdc on both sides, but I still have no video nor sound.

Does anybody out there have any suggestions? BTW: My voltages are now different since I soldered a wire across fp1 (does anyone know where I could obtain a new fp1 I would like to have the fuse in place) as Andrew suggested as follows:

pin - name - on
4 - 24Vcc - 23.9
9 - 12Vcc - 11.97
11 - 5Vcc - 5.11
13 - PWON - 3.32
14 - ACD - 0.01
15 - DIM - 2.16
16 - BLON - 3.3

Is 5.11 volts within tolerance?

[Andrew F. Ali]

Re: Toshiba 40e210u - no picture/sound

OK. So now we could have a bad T-CON Board, where a short caused the fuse to open. The short caused something else to open giving the original symptom. I would replace the T-CON board as my first try.