Chosen Solution
Hi, during normal use the TV (auto)switched off, and the standby red led started to blink 3 times at regular intervals. I suspect it may be due to broken power supply, as the day before we experienced some overlaods during a bad-weather night. Do you guys have any advice on what I could check with limited equipments in order to avoid spending (in first instance) lots of money for a professional repair?
This is most likely a main power supply failure. It will be easiest to replace it, but you may be able to repair it. Remove and examine for blown capacitors and cold solders.
Gianco, post some images of your power board with your question. For that use this guide. You will at least need some sort of multimeter. Level 1 Error 3 is a 12V error, most likely coming from the power board. This error can be caused by a shortened diode on the power board. Look for something like D210 and see if it looks “odd”. Of course you can always go and replace the complete power board.
replace the 24V rectifier elements in the secondary circuit - Schottky diode SB3200 and filter capacitor 470uF.
