Question about Toshiba 42HL196 42 in. LCD HDTV

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Same problem. red light flashes 3 times, but will not turn on.

Red light flashing

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Hi,

The blinking light means the controller QA01 in the AV_TERM system board is booting and driving the TIMER/REC RED LED light accordingly. This failure mode is true for many conditions, not exclusively for the main PS board PE0071. It could be caused by many things, LOW B, SEINE, AV_TERM, LCD, PROTECT, etc.

Specifically for PE0071+12VDC circuit failure, which is the most common , listen for the LINE relays SR80, SR81 coming online. If several (3) or more clicks are present when applying power to the TV set then suspect the +12, 20, +32 VDC inverter is faulty.

As a quick check, you can disconnect P807B. If the relays cycle every 1-2 seconds then is most definitely the +12VDC inverter. Check for voltage level at optocoupler Q881 pin 4 and this should not be cycling. This point is the VCC for the oscillator. Repair or replace board 75002913 as necessary.

TROUBLESHOOTING: (this is my own, not the OEM !, try at your own risk!)

  1. Check for LINE1 input voltage level at inverter on sheet [4].
  2. Check for LINE2 input voltage level at inverter on sheet [3].
  3. Check for STBY +5VDC & +25 VDC ( observe correct GND REF) page [4]of PE0071 POWER
  4. Check for +22 VDC out of regulator on page [3] out of Q822 Emitter
  5. Check P809B connector for :
  • P809B (12) POWER = 3.00 VDC (+/-0.2)
  • P809B (11) POWER_SIG = 0.00 VDC (HIGH to Power on TV)
  • P809B (10) PROTECT = 0.00 VDC
  • P809B (9) ACDETECT = 3.00 VDC (+/-0.2)
  1. Check for PFC_OUT = 368-371 VDC
  2. Check for +12, +20 & +32 VDC inverter page [5] of schematic manual.

For +12 VDC Inverter, suspect components:

Q880 STR-W6765 PSR (works really hot!!)
C888-C890
D884A and related switching circuit components.

Good luck,

mrwindex

Posted on Nov 08, 2009

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Main power supply board bad

just fixed unit with same problem

toshiba trouble shooting will lead you to believe low B+ board bad

replaced twice no go


replaced main power board set worked fine


part number for main board is 75002913
Low B+ is 75002920

I think you will find main board to be problem most of the time

Posted on Aug 07, 2009

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mistersony
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SOURCE: standby light flashes 3 times

A 3 flash pattern indicates that either the lamp is not seated correctly or that the lamp door is not latched properly. It can also be a fault with the switches that sense whether the lamp is seated or the door is latched. Try reseating the lamp and relatching the lamp door

Posted on Oct 20, 2008

  • 1039 Answers

SOURCE: 13 red flashing standby lights tv turns on, then off

Seek professional serv technician. No listing for 13 fashes only up to 9.

Posted on Apr 25, 2009

  • 1 Answer

SOURCE: philips 50pf9631d/37 no picture sound. Red light flashing

hey crs246, I have the same exact problem with my philips tv same model. Have you gotten any help that you can share with me. Any help would be appreciated.

Posted on Mar 06, 2010

  • 3 Answers

SOURCE: timer rec red light flashes 3 times

the problem is the main power board you can ither change the whole board or change the STR-W6765 Primary Switching Regulator.

Posted on Jan 26, 2011

  • 1 Answer

SOURCE: My Toshiba 42lx196 will not

I have the same model and the same problem. I was watching it when I heard a loud "pop" and the screen went black and got no response from any controls. I paid $50 at a repair shop to tell me it was the power supply board and would be an additional $275 to fix. I chose to buy another tv but am searching for the part. Here are part #'s - 75003371, PE0071G-1. Some online stores have carried it for anywhere from $70 to $200. The cheapest I have found in stock anywhere is $150. Just google those numbers.

Posted on Jun 15, 2011

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