Philips 42PFL7962D/05 Dead blue LED flashes

[TEDDIBEAR]

I have been asked to have a Look at my friends Philips 42PFL7962D/05 TV , The blue led lights on switch on. then every ten seconds goes off then back on , if the TV is left on eventually a picture will appear and will go off, leaving the blue led pulsing again every ten seconds, I have checked all of the capacitors on the power board with a ESR meter all check out good, there are no signs of bulging, capacitors or any overheating, have checked for dry joints and shorted diodes, any help will be appreciated.
John

[TEDDIBEAR]

Re: Philips 42PFL7962D/05 Dead blue LED flashes

Update standby red LED pulses once then followed by three pulses in quick succession.
John

[tom66]

Re: Philips 42PFL7962D/05 Dead blue LED flashes

Error code is "3" then.
What is the chassis number of your TV? Written on the back in a box marked S on the product label. For example Q993.1LA-U

[TEDDIBEAR]

Re: Philips 42PFL7962D/05 Dead blue LED flashes

There are two numbers on the back one is VN 1A0738 002141, the other is 147 055 042 223 077 242 006, can not see any Q prefixes.
John

[PL519]

Re: Philips 42PFL7962D/05 Dead blue LED flashes

Hi Teddibear,
chassis is LC7.5E_LA. Service manual can be downloaded from this site:
http://www.eserviceinfo.com/download..._LCD%20TV.html

According to the manual one blink means "DC protection of speakers", three blinks means "Reserved" (for what??).
Try disconnecting the +- supply voltage of the audio power amp TDA8932T.

[tom66]

Re: Philips 42PFL7962D/05 Dead blue LED flashes

Try also disconnecting the speakers themselves.

[TEDDIBEAR]

Re: Philips 42PFL7962D/05 Dead blue LED flashes

Thanks you for your help ref above, Ordered a new power board, fitted job done, I have since checked every cap and semiconductor on the old panel but could not find any faulty. these modern sets are mind boggling.
So this post can now be closed.
John