Sony KDL-40EX500 No Power

[drpj23]

This sony seems to have no apparent power but does have 3.3v stby.
On top of that there is 3.3v at BL_ER which I believe is signaling an error.

I have already replaced the main but in no change in symptoms.

I have read, as well, on here that this tv does have some inverter errors but there are no flashing lights or error diagnostic.

I am just thinking i have a faulty main but I need a second opinion or test procedures.

[tom66]

Re: Sony KDL-40EX500 No Power

Cut the BL-ERR wire, use a ~100 ohm resistor to force it to ground, and see if the set then starts up with 2 seconds to black or if it powers on and stays on (bad bulb possibly, but it might have no lockout, so run it no longer than 30 seconds.)

BL-ERR would be from the inverter to the main not the other way around IMO.

[drpj23]

Re: Sony KDL-40EX500 No Power

I would think so too but if I would unplug the inverter the error is still there.

Well I had a 400 series come in and thought I would swop the power supply and I suppose the power supply can also trip the BL_ER if something is wrong with itself because it works with the new power supply. Go fig.