hi, I have a sharp tv model LC-40LE814E with DPS-126CP-1 A power supply.
the tv initially turned on, displayed the image for 10 seconds and then turned off. so in a loop until the power was cut off.
reading the classic optocoupler problem I changed the mounted cosmos with SHARP PC817 recovered from other boards.
now the TV turns on for 1-2 seconds and turns off giving 2 flashes in the front LED.
to avoid banging too much I preferred to take an identical tested and working card (or so the supplier says)
with the new card it only flashes 2 times on the front LED and the backlight doesn't even start for a few seconds.
you can't even enter adjustment mode with the procedure shown in the manual.
Any advice on what it could be or what to try?
Thanks in advance
the tv initially turned on, displayed the image for 10 seconds and then turned off. so in a loop until the power was cut off.
reading the classic optocoupler problem I changed the mounted cosmos with SHARP PC817 recovered from other boards.
now the TV turns on for 1-2 seconds and turns off giving 2 flashes in the front LED.
to avoid banging too much I preferred to take an identical tested and working card (or so the supplier says)
with the new card it only flashes 2 times on the front LED and the backlight doesn't even start for a few seconds.
you can't even enter adjustment mode with the procedure shown in the manual.
Any advice on what it could be or what to try?
Thanks in advance