I have a Toshiba 43L310U TV, serial number F37A033A029222. The TV has been intermittently failing to power up--sometimes working, sometimes not. The red LED light would be lit, but then when I try to turn on the power, the TV does not turn on, and the red LED light turns off. I've unplugged numerous times for a long time, turned it back on, and it does not start at all now. My gut tells me its the power board, part PK101W1190I, which is what is on the power supply board on the unit when I open it up. I have no problem buying one online for $40, but I'd like to get your opinion on whether this could be the component before purchasing. Knowing my symptom was intermittent startup for a while, and then eventually a complete inability to power it up, does this sound like a power supply to you? Thanks for any help you can offer. Feel free to contact me at [email protected], or call me at 757-817-6708. I'd be happy to buy from you if you have access to the part, or I'd be happy to take a reference to someone else if you could benefit from giving me a reference of who else might have it.
SOURCE: Toshiba 50H50: No picture or sound, red light blinks
On alot of these Toshiba TV sets, there is a fuse called F860 that will blow and the light will flash because of bad solder connections on C 810, and C 809, on the negitave terminal. I have seen many of these boards condemed by non-authorized Toshiba repair shops. Good Luck
SOURCE: Sony KP-51WS510, standby led blinks 5 times
It sound like you have a bad picture tube...check your 1k circuit for correct voltage and wave form.
SOURCE: toshiba 50HX81 projection 'tv- blinking red light
The TV is on protect mode.
Try first leaving the TV power cord unplugged for some times, let say one hour or so.
Also
ensure that the fault is not coming from a faulty receiver box sending
bad signal, check if you get same problem with no receiver box
or dvd connected.
If that does not work, and you keep having a flashing
led on front of the TV, and tv turning off by itself after a while,
that indicates a fault condition.
The flashing light indicates a diagnostic state called protection.
When the TV goes on protection there are only two possible reasons.
1The
internal circuits are jammed because of electrostatic
charges accumulating on capacitors, or because of a wrong voltage read
by the main chip on your monitor controller board. this started the
protection circuit.
2 The protection circuit detected a wrong
voltage or abroken contact, identified an internal fault and kicked in
, startingthe flashing light.
If you are in situation one, then theTV will reset just unplugging power cord for one or two hours,sometimes even minutes.
If you are in situation 2 , then there is an internal fault.
Common faults
that can occur are a blown capacitor on power board, a
convergence IC has blown, or a fault on Digital board.
Check also
the video cable or any external connection cable, if the cable is shorting, or the connector is bad, you
can get same flashing state because of the video cable.
If under warranty contact the manufacturer ringing the number on the user manual
If you want to repair at your own expenses, just locate any good qualified repairer.
SOURCE: Toshiba 42HP95 TV turned itself off, red light blinking
has overheating issue try vacuming out the top and rear of tv. fan could be dead
SYMPTOM: Won't turn on or intermittently won't turn on, Red LED Flashes.
CAUSE: Loss of Main Switched Power Sources. Standby power is OK.
SOLUTION: Replace Regulator IC Q820 with Toshiba Part # 23135094
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