Samsung TV power LED flashing pattern as soon as plugged in
TV was stored in attic for the past 6 months probably subjected to hot summer and cold winter. Pulled it out and plugged it in and it worked fine for about 3 hours. While i was searching for the Roku remote. That is when i noticed that the TV had shut off and was flashing. I figured it was some kind of sleep mode but well i was never able to wake it.
As soon as power is plugged in the red power led starts flashing a repeating pattern.
On for 1 second, off for 1 second, on for 2 seconds, off for 2 seconds.
Things I have tried:
Unplugged and set for 24 hours. Still flashing pattern immediately after plugging in.
Checked the glass fuses on the power board - two total, not blown
Checked the output voltages of the power supply board - All present at the correct level
Checked all the Electrolytic Caps - none are bulging, ESR is low and the few that looked questionable I removed and verified capacity was still correct.
Reseated all connectors
Checked voltage regulators on the video board - 7805 and 7809 had a 5 and 9 volt output respectively.
Reflowed solder joints on power supply board with hot air rework station/soldering iron
At this point I am out of ideas and am hoping someone with more TV or Samsung troubleshooting knowledge can point me in the right direction so i don’t have to give up on this and toss the TV.
Thanks in advance
Voltage measurements after reflowing ( described in my comment below )
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