no backlight on set.
the 20v rail fuse on the mainboard was blown. i replaced and backlight and tv worked for about a day before flickering and out again
input on mainboard for led should be 20v to fuse but is reading 26v at input and <3v output.
power supply output should be 20v/24v from connector and output is reading >25.6-26v
any suggestions?
i also tested backlights with tester and they were all same steady voltage and on
output switch transisters seem to be reading fine in circuit.
will check capacitors esr next
the 20v rail fuse on the mainboard was blown. i replaced and backlight and tv worked for about a day before flickering and out again
input on mainboard for led should be 20v to fuse but is reading 26v at input and <3v output.
power supply output should be 20v/24v from connector and output is reading >25.6-26v
any suggestions?
i also tested backlights with tester and they were all same steady voltage and on
output switch transisters seem to be reading fine in circuit.
will check capacitors esr next
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