Panasonic th50px75u red light blinks infinately every three seconds. already replaced power supply board and got same result what now?

An interruption in the power supply is the main cause of the red light flashing problem. This interruption is often the result of swollen or blown capacitors. Capacitors are a very important part of TVs as they save and release electricity in the TV

Usually this means the backlights in the display are faulty

Hi Ron,
Please watch these videos on youtube

Panasonic Plasma TV 7 Blinking Red Lights FIX - YouT

Panasonic Viera TC-P50GT30 7 and 8 blinking red lights - AVS Fo

I hope it helps.

If it is from ShopJimmy you can't be certain it's a good one :-)

And second, that sounds like a main board problem, not power board problem.

7 blinks is indicate for faulty power supply however if you already replace it the possible problem is on main board..

HI,

Panasonic PT50LC13 lamp indicator blinks to tell you the lamp is faulty.

You need to replace the bulb or TY-LA1000 lamp assembly. This link displays all Panasonic TV Lamps and TV Bulbs. This page shows Panasonic lamp location and How to Replace TYLA1000 bulb. TY-LA1000 Bulb Replacement requires the use of a long Philips Screwdriver to reach screws within the lamp cage.

Unplug AC power before removing the lamp and re-install all doors, etc, correctly before starting the TV. Vacuum any visible dust or lint from air vents and lamp area. Do not used forced air to blow out dust, big problems may result.

The user's manual has a description of what the Blinking LED indicators mean.


Image of TYLA1000 lamp.


Robert

Power supply board have dead capacitors.U know how to solders?Buy these capacitors to replaced them to have power back.Or u can buy a whole power supply board for the replacement at these websites Shopjimmy.com,Ebay.com for refurbish power suppply board.

A 6 blink SOS shutdown, you would want to be looking at the SC, SU and the SD boards. One of those boards is causing the malfunction. Possibly, but unlikly(I have to mention it for just in case reasons) the PDP panel could have blown those boards.

Just out of curiosity, what was the original problem that made you call the first repair guy?

it's a defect. we call it red blinking death. the boards inside the tv has gone bad.

Solved by resoldering some solder joints!!!!!!!
********
Toshiba Model 57H81 Rear Projection TV - Purchased 11-09-2001

Problem: Toshiba 57H81 Flashing Red Power Light, No Picture/Sound, Blown Fuses F850 + F852

Symptoms January, 2009:

• Upon turning on set I got flashing red power light and nothing else.
• Removing plug for one minute and plugging in results in:
• Audible click, steady red power light for 2 seconds then slow flashing red light
• Pushing power button results in steady red for about 2 seconds then slow flashing red light, no other set activity
• Removing power cord for several hours and plugging back in made no change
• Audible click, steady red for about 2 seconds then slow flashing red light
• Possible related note: Over past several months occasionally the entire screen would flicker momentarily and at other times be problem free for weeks.
• Fuses F850 and F852 found blown

Repairs Made:

• PD0074 DEF/CON Power Board
• There are two main power supply capacitors in this set. They are C-809 and C-810. One their negative lead on the printed circuit board re-soldered leads and nearby contacts. I’m told that because the factory left out a printed circuit board eyelet, the connection will come loose over time. When I called Toshiba customer service they said there was a known solder joint problem causing blinking red light.
• Replaced blown fuses F850 and F852.
• I actually installed a fuse panel on the inside of the cabinet and routed the fuse connections here instead of ordering the special fuses and replacing them on the circuit board.
• Had to use a 5 Amp SLO-BLOW for F850. Fast blow does not survive power up. Get the red blinking light.
• Used a fast blow 2 Amp for F852.
• PD0073 SIGNAL Board
• Re-soldered Q751 + Q752 STK392-110 Convergence Amps
• Re-soldered adjacent pads that looks suspicious

Total Cost to Repair about $10

• Twelve hours of my time over three days to research issue, disassemble set, make repairs, add fuse panel.
• Already owned Service Manual and Circuit diagrams from a different 2004 repair.
• Less than ten dollars at Radio Shack for fuses and fuse panel. Already had wires, etc.
• Some solder. Already owned de-soldering tools, etc.
• Visited both local authorized Toshiba factory service repair facilities. One said repair would have to include replacing Q751 + Q752 STK392-110 Convergence Amps with ST392-180, and realigning set for a total of $500+ and it would be more if they had to order a power board. NO THANK YOU! Other shop said $65 for site visit and $30 to make an estimate that could be applied to repair.