Question about Toshiba 42HL196 42 in. LCD HDTV
Red light flashing
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!)
For +12 VDC Inverter, suspect components:
Q880 STR-W6765 PSR (works really hot!!)
D884A and related switching circuit components.
Posted on Nov 08, 2009
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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Posted on Jan 02, 2017
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
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
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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