just chiming in to say I had a similar fault, no power at all from the charger. DT16 was shorted gnd to vdd , DT1 had no apparent issues but removing both was needed. ill order some new ones but in the mean time its back to life.
this was caused by a dead DELL charger. one "flash" on the charging led as soon as i plugged in and no more charging since.
somehow using a powerbank which only gave 20W at 12V allowed it to charge slowly? althought only when laptopt was OFF.
Its like it didnt need to communicate , really confusing stuff.
nebbia88
New Member
Last Activity: 03-19-2025, 09:21 AM
Joined: 04-28-2009
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Re: Vestel 17IPS62 power supply dead by lighting
some progress.. I changed D3, D6, C92, C102, U3 (TL431).
still shutting off randomly with 100% backlight, but lowering it to 90%, pulling 42W from the wall now its rock solid at least used it over 2h repeatedly .
in my use it rarely stays on more than 1h followed by 6h standby.. so i'll keep it like this.
Thanks everyone for your inputsLeave a comment:
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Re: Vestel 17IPS62 power supply dead by lighting
hi, test with hairdrier did nothing.
I went ahead with the parts cannon approach and swapped from new board:
C54, C55, C57, C71, D23, D24, D25, U4, SP1, SP3
after this the PSU came back to life. got 12V (actually 11.7-8, not very stable).
got into the menu and turned backlight way down, 15-20%, pulling 22W from the wall. it ran fine for at least 2h (confirmed leds are absolutely fine, so the flashing i got from new board is for some other incompatiblity)
...Leave a comment:
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Re: Vestel 17IPS62 power supply dead by lighting
yeah im leaving the panel disassembly as last resort , dont have spare leds anyway.
I'd like to get the original power supply to work at least as good as the new one first xD
is there some sort of steps to figure out what part is the culprit before I swap over stuff that definitely works?Leave a comment:
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Re: Vestel 17IPS62 power supply dead by lighting
thanks it could be but I just can't put 2 and 2 together.
I'll try to describe the full story best i can.
got given this TV from relatives te32287b35txd "one day it shut off and now doesn't turn on". few weeks went by.. I plug it in and it just works perfect.. for 10 minutes.
then it went to just slow led red flashing but no backlight no audio nothing. then just completely dead.
so i took it apart and found 3V instead of 12V on the C54 and diodes output...Leave a comment:
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Re: Vestel 17IPS62 power supply dead by lighting
it seems to be 1Q001 but this is as good as picture i can get xD
I have slow pulsing on U1 VCC pin 10-13V no idea if its supposed to do that.
why u think change TL431? is there a way to test it with a multimeter?
[url=https://imgbb.com/][/url]Re: Vestel 17IPS62 power supply dead by lighting
it seems to be 1Q001 but this is as good as picture i can get xD
I have slow pulsing on U1 VCC pin 10-13V no idea if its supposed to do that....Leave a comment:
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Re: Vestel 17IPS62 power supply dead by lighting
similar issue here.. 3V on +12V
bought another board but got a different version so its not compatible with my tv at least i think it's not cause it only gives brief backlight flash on startup.
anyone have some guidance like a troubleshooting process?Leave a comment:
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Re: New Members - please post your introductions here
Hi everyone, Nebbia from Italy, just getting started as a hobby to work on electronics.
I have a soldering iron and a multimeter, and a usb hantek scope.
hope to find good info around here!Leave a comment:
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