40 inch Vizio at the curb..

[rca2000]

I'll bite..BUT the last FIVE FP sets I have run across had bad or broken panels..

Anyway...you say you are getting 5V, I assume standby voltage. Have you determined if you are getting the "turn on" command, from the signal board--to turn on the RUN supply? It is either a "low" voltage, that goes "high" when the power is turned on, or the reverse of that. Such as a line to the PS, that is at "0" volts or so--that suddenly goes to at LEAST 3v at turn-on. This turns on the "run" supply and the backlight, and probably switches on the 'boost converter', so that the PS operates at a more efficient level.

just because there are no obvious swelled caps--it does NOT mean this can't be fixed.. You just have to be willing to do some testing.

[centralradio]

Originally Posted by jr_tech

Unless you get lucky and find a blown fuse, bad diode or bulged and/or oozing electrolytic capacitor on the power supply or main board, it is pretty much "game over" unless you have an esr meter to probe caps on the board that might look good but are nevertheless bad. Sometimes a replacment board can be found on eBay for a reasonable price ... do you feel lucky???

jr

The fuse is good .I still got to get an ESR meter.I'll look at it more .

Originally Posted by rca2000

I'll bite..BUT the last FIVE FP sets I have run across had bad or broken panels..

Anyway...you say you are getting 5V, I assume standby voltage. Have you determined if you are getting the "turn on" command, from the signal board--to turn on the RUN supply? It is either a "low" voltage, that goes "high" when the power is turned on, or the reverse of that. Such as a line to the PS, that is at "0" volts or so--that suddenly goes to at LEAST 3v at turn-on. This turns on the "run" supply and the backlight, and probably switches on the 'boost converter', so that the PS operates at a more efficient level.

just because there are no obvious swelled caps--it does NOT mean this can't be fixed.. You just have to be willing to do some testing.

I got 5 volts SB voltage.I tried looking for a schematic online but nothing close to it.Lucky enough the board is will labeled on everything.

This is the part number
Delta dps-260hp a rev s1
Photo in attachment.

Thanks for the help guys.

[rca2000]

I looked up the PS board. I think I see a pin that says "P-on'. this is the power-on pin. does it change in a big way--when the power button is pressed?

if it does not do so...try tying this line to the 5v standby line--and see if the voltages come up then. If they do..the signal board is not providing power command. If NOT..the PS is not working. It could be loaded by a shorted inverter or a problem on the PS board itself, or even a bad signal board.

You should be able to remove the PS board entirely--and turn-on all run voltages. I often test them this way.

PS boards are available on line on the "bay, if you need one--and are not able to repair yours. .