40e220u Toshiba tv won't power on. Tried power button on back of tv and green light comes on for 15 seconds or so and then goes out.

SOURCE: Toshiba 42HP66 No Picture, Only Power Works

try replaced z board Manufacturer Toshiba Part Number 75003032 Description ZSUS PCB ASSY

SOURCE: Toshiba 50hp66 The tv shuts off and the red light

Sounds like a system failure - one of the controller boards may have gone bad. If the unit is still under warranty, contact Toshiba for warranty service. Otherwise you will need to contact one of the authorized service centers or your local TV repair guy to arrange for repair.

SOURCE: 42" Toshiba Plasma TV wonn't turn on

Power board require changing.It dead.

Tom Carson

• 3083 Answers
• Posted on Mar 01, 2011

SOURCE: Our Toshiba 42HL196 TV refuses

If the tv doesn't reset after being unplugged awhile, there's an internal problem, and the unit will have to be serviced. Make sure the cable input isn't loose, and that the cable cord is good. Aside from that, there's not much you can do. Some cities have mobile TV repairmen that will service the unit in your home, and it's much more convenient. Look in your Yellow Pages under TV Repair.
Good luck, and hope this helps.

SOURCE: I have been trying to turn on my Toshiba 55HT1U television, but it will not come on. I get a little green power light but the screen is still black.

Hello, Thomas!
Looks, like there is an issue with inverter or inverters power supply(24v).
first thing to do: poke your set open, get to inverter make sure it has +24v in a main fuse. If so, in most cases: check fuse for continuity. Must have a multimeter to do that. Some LCD panels have 2 inverters: Master and slave. Known for frequent failure. Easy to determine: usually, on board IC chip bursts on failure. Or, if you really lucky: you may see "bloated" capacitors on those boards, as well on your power supply. I'd start with power supply, then check inverter(s). Good luck!
Thanks,
Alex.