OK, watching the circuit it's a reset chip, but top right pin is strange at around 0v, if you are able to remove this chip without damaging it you can after it power the set and with a scissor or wire perform a reset between the pads of the switch solder place..
-
-
Just a follow-up. I replaced the main video board from a different supplier. The TV works again.π π π
Many thanks everyone for the help on this.
Comment
-
Good job, glad you concentrated on getting another mainboard, SO many times people let a bad replacement board allow them wander off in the wrong direction.Comment
-
Same end as always.. no technical actions done.. unfortunately for us..Comment
-
Hi,
Iβm trying to fix an HP EliteBook 840 G6 that stopped working after a lightning storm.
β Charger is OK and 19V is present at the motherboard.
β No charging LED, no fan, no reaction.
β I donβt see any 3.3V or 5V near the coils.
β Battery is unplugged.
β Iβm new to board repair but can use a multimeter.
I added a clear photo of the board.
Any idea where to start or what to check next?
Thanks a lot for your help!...07-01-2025, 10:45 AM -
Yes it's a 17 year old Panasonic plasma!
I was watching TV when there was a huge lighting strike nearby my house that shook the house. When that happened, the picture on the TV froze and the TV wouldn't turn off except by pulling the power cable. Now if you plug in the TV, it seems to turn on (it makes the turn on "clikcs" it always does, the red power light comes on but there is no picture, although I can see the back light around the edges. And the TV doesn't respond to the power button on the remote to turn off, and doesn't respond to the manual power button on the front... -
THE LIGHTNING:
This was a very close strike, blew a 15 amp breaker for all ceiling lights in home AND could smell ozone for a few minutes after strike.
Very close and probably a very strong EMP.
THE TV:
No standby LED. Some voltage from PSB (not totally dead).
But found a kit of ALL 4 circuit boards for $55.
At first thought, this will fix my TV.
But then lightning has the ability to totally fry semiconductors. Which would include any or all of the PCBs. However, the display is one big semiconductor and given... -
hi everyone,
my parents in law have seen their Bravia Sony LED 32EX600 TV set stop after a lightning strike. After being plugged to mains, it shows nothing no power LED on bottom left shines.
On the power PCB (GE3b, attached pic), I chacked the fuses and the only roasted one is R6536 : 0.47 ohms, 1/2W. After replacing it, I made some voltage measurement with ref to the chassis :
- the 450V/150uF capacitor voltage when plugged is normal at 394V
- from connector CN6150 (15 poles)
STBY normal 3.3V -> I shunted it to 3 (POWER ON) and 11 (BL ON) and unplugged...06-28-2023, 02:43 AM -
Hello Everyone.
This powerful amplified subwoofer doesn't make any sound after lightning striked near the house were it was plugged in.
It consists in :- a power board were the full H bridge class D amplifier and main power rails are located
- a preamp board (ref. F.01U.299.771) receiving 2 symetrical inputs(IN1, IN2), a digital chain (A-D converter -> Digital Signal Processor -> D-A converter) and a micro controler in charge (at least) of the human interface (lcd display and 1 rotating button)
human interface is working fine
Input levels are...01-23-2024, 10:21 AM
Comment