it appeared all of a sudden. with a unit connected I can power it back on for about 1 sec then it shuts down again
no when it shuts off no noises no blinking light. if you didnt know any better you would think someone hit the power button on the remote. then you can turn it back on and count to 8 then it shuts off and just goes back to solid red light on front of tv
already done that. if nothing is connected to a input the tv stays on. can navigate menus and change aspect ratio. I have the back of the tv off. no bad caps on the power board.
O.k then , at first I was tempted to say the power board as pretty much all the problems I`ve seen with this model came from the power board , namely bad caps.Still could be the power board that fails when it is asked to deliver more current i.e when the tv is processing signal.Can you see the plugs that go to the backlight inverters ?There should be two connectors side by side labeled CN905 and CN 903 , set the tv on a live input and disconnect those plugs to see if you will get the sound and if the tv will stay on ?Note that you won`t get the picture
ok removed the back light plugs. powered on tv. turned on xbox heard sound. it stayed on for 15 seconds. then i heard a quick popping sound from the speakers as the tv shut off. light went red. didnt blink
ThanksOn the main board there is the LVDS connector CN850 , it is a 40 pins connector .Replug the backlights on the power board and unplug that CN850 on the main then try the tv again with a signal.
Hi Jack. So with removing the cn850 the unit is staying on but not displaying any picture at all i reconnected the backlights as instructed. i can hear sound from the unit
as soon as i plugged in the cn850 unit shut off instantly
cbpf72mkpi and lower half of barcode p4m574370217
engraved in top corner of board is dlh 715t2303-3
Sorry it took a while but that board part number CBPF72MKPI A.K.A 996510008583 was difficult to find as all the regular suppliers seem to be out of stock, I found one that seems to have it at the link below;
You can also use the part numbers I gave you if you`d like to do your own shopping.Give it a try and you can reach me here at any time after this chat is closed if you have questions about this.Thanks and please take the time to rate my answer