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TV Philips 42pfl6057h/12 blink 2 times and not turn on

Good evening, I have a TV as described that won't turn on and the led, after about 5 minutes that it's powered on, flashes twice endlessly.

I opened the back panel and measured if the voltages feeding the motherboard were present.

So at the output I have 3.3 and 12 volts and the standby voltage goes to 3.3 then to zero every time the switcing starts because when the TV is on I hear a very faint hissing of the switcing transformer and the processor touching it gets warm, after a while it cools down, the very faint hissing is heard again, the processor gets warm again, everything continues until the led starts blinking.
The voltage measurements I made on cn4 of the attached schematic.

Do you think the fault may be in the power supply or the mainboard ?

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Hi @albertocauzzi

Here's the service manual that may help. I realize that it is for the 47" model so hopefully it is the same for your size TV.

A 2 blink error is a Layer 1 error code which according to the manual indicates a problem with the SSB board (mainboard) - see the error code table on p.35/165

If you want to narrow it down further you can try to activate the CSM mode in the TV to see if you can get a Layer 2 fault indication - see p.27 activate csm mode

On p.40 it shows the ssb board replacement procedure.

Hopefully this is of some help

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