LG 32LB1R - dont turn on

[jimmiscom]

Good day
i have a LG 32LB1R dont turn on. stand by led is steady (not blinking or flashing) but dont turn on.
any idea what to check first ?
if you have the schematic of the power supply would be very usefull
(i only have schematic of the main board)
tks

[vinceroger69]

Re: LG 32LB1R - dont turn on

Good day
i have a LG 32LB1R dont turn on. stand by led is steady (not blinking or flashing) but dont turn on.
any idea what to check first ?
if you have the schematic of the power supply would be very usefull
(i only have schematic of the main board)
tks

What power supply number is used in your tv this maybe be the correct Service manual

[jimmiscom]

Re: LG 32LB1R - dont turn on

thank u. i have al ready the service manual of the main board im looking the power supply diagram (yp2632t)

the strange is that i measured the standby 5v voltage and was ok (about 4.8v)
then i pressed the power button and suddenly it turn on.
i closed it after few minutes and tried to open again but didnt turn on this time.
i measured again the standby and when i pressed the button again it turned on.
so everytime that dont turn on and i take a measurement with the multimeter it turns on.
something must be charged after the measurement.

any ideas now ?

[vinceroger69]

Re: LG 32LB1R - dont turn on

thank u. i have al ready the service manual of the main board im looking the power supply diagram (yp2632t)

the strange is that i measured the standby 5v voltage and was ok (about 4.8v)
then i pressed the power button and suddenly it turn on.
i closed it after few minutes and tried to open again but didnt turn on this time.
i measured again the standby and when i pressed the button again it turned on.
so everytime that dont turn on and i take a measurement with the multimeter it turns on.
something must be charged after the measurement.

any ideas now ?

connection or solder connection on the pin your testing? maybe also worth checking the esr/uf rating on the capacitors on the power supply
a quick read of this thread does suggest it might be a capacitor issue too so i would fully re cap the power supply
https://quuq.org/forum/index.php?topic=6929.0