I bought a broken 32" on craigslist cause i was bored ... not a whole lot of money left in repairing 32"ers, but need something to distract me from spending more money on guns.
Its a ~ 1 year old sony (probably a good sign that sony's get out of debt plan to cheapen all their sets is starting to pay off
, doesnt power on, no light on front (should the LED be always on / red on new models when off?). I checked the power supply board and it outputs 3.3v on standby, 12.5 volts on 12v when jumped on, and 25.4 volts on the 24v for the inverter. When the mainboard is connected the voltages go to their on state automaticaly after plugging it in (12v and 24v become present), and i hear a near silent clicking from the processor area of the main board. I also tried reseting the set by holding the power button and pressing up on the remote, but no change. (is that just a settings reset on sonys, or will it clear error states?)
Im not sure where to test next to see if its getting the signal to turn on from the IR board, or the button board. The button board does get 3.3v on 1 wire out of 3, but im not sure if its a simple connection to 1 of the other wires that turns the set on, or a more complex signal / pattern. Im not sure if these sets can get a failure signal from the inverter / tcon and choose not to turn on , but youd think in both those states the LED would change color, and using the factory reset would make them turn on again for 2-3 seconds before erroring again.
Ill post some pictures in a few minutes, but here are some part numbers for reference
power supply board: aps-283
main board: mt5388 lite (there are a lot of other numbers various people give, not sure which are correct), theres 2 versions on ebay for various 32/40/46 inch versions that all seem to be built on the same board. I can get one of the other versions for 10 dollars so tempted to try that, but might be a panel vendor change.
Its a ~ 1 year old sony (probably a good sign that sony's get out of debt plan to cheapen all their sets is starting to pay off
, doesnt power on, no light on front (should the LED be always on / red on new models when off?). I checked the power supply board and it outputs 3.3v on standby, 12.5 volts on 12v when jumped on, and 25.4 volts on the 24v for the inverter. When the mainboard is connected the voltages go to their on state automaticaly after plugging it in (12v and 24v become present), and i hear a near silent clicking from the processor area of the main board. I also tried reseting the set by holding the power button and pressing up on the remote, but no change. (is that just a settings reset on sonys, or will it clear error states?)Im not sure where to test next to see if its getting the signal to turn on from the IR board, or the button board. The button board does get 3.3v on 1 wire out of 3, but im not sure if its a simple connection to 1 of the other wires that turns the set on, or a more complex signal / pattern. Im not sure if these sets can get a failure signal from the inverter / tcon and choose not to turn on , but youd think in both those states the LED would change color, and using the factory reset would make them turn on again for 2-3 seconds before erroring again.
Ill post some pictures in a few minutes, but here are some part numbers for reference
power supply board: aps-283
main board: mt5388 lite (there are a lot of other numbers various people give, not sure which are correct), theres 2 versions on ebay for various 32/40/46 inch versions that all seem to be built on the same board. I can get one of the other versions for 10 dollars so tempted to try that, but might be a panel vendor change.
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