These are protective diodes and they are located at the AV signal input; if something was connected during lightning, then the discharge passed through this input and could kill the processor.
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Which ones are you referring too? If you are talking about the D407 and D409 that I found burned, these seem to be diodes and upon more checking are not good. One is totally open in either direction.
These diodes are close to the RCA input jacks on the board. The only port that was connected during the strike was HDMI1.Last edited by karthur; 11-28-2023, 07:58 AM.Comment
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probably diodes are a previous fault..Comment
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When I tested the IC601, I get a reading with the "+" probe on the anode and "-" on the cathode. When I reverse the leads, shouldn't this now read "0" for a good diode? I get a reading >0 when I do this for both legs. Does this not mean the diode is faulty?
I tested IC601, IC602 and IC204, To me all three seem to be faulty. Am I testing these wrong?
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IC601 stands for Integrated Circuit 601, why you tell about anode, cathode?Comment
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I thought you said IC601 was a double diode. I have been treating and testing it as such.
Refer to post#16 above.
Last edited by karthur; 11-28-2023, 09:18 PM.Comment
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After much searching, I finally found a datasheet on this component. This component is made by "Diodes Incorporated". This is a voltage regulator. A link to the data sheet is here.
https://cdn.badcaps-static.com/pdfs/...fca50db500.pdf
Attached FilesComment
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There was no need, it's a common 1117, so what you have on tab of ic601? if 3,3v it's ok, then software issue..stop..Comment
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Voltage on these components
IC204 (on the tab) 1.5vdc
IC601 (on the tab) 3.3vdc
IC602 (on the tab ) 1.8vdc
Does anyone have a dump for the IC901 chip?Comment
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Found a .bin file on ***********. They charge for a "VIP" membership in order to download the file. Anyone used this site? I am needing the " UN60EH6000FXZA bios bin".
ThanksComment
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Do I need to remove the chip from the board or can it be read while installed?
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you can try to solder tiny wires, not all pins needed, vcc, gnd, di, do, clk, wp and maybe cs... have you got an old transformer to unroll the wire?
Note: Lotas thankyou for the dump for the Sharp tv, it worked!Last edited by Davi.p; 11-30-2023, 10:21 PM.Comment
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Component inputs was not connected!!Comment
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Is it a smart TV? I guess not..Comment
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I have not given up on this just yet. I finally got around to replacing the main board and I still have the same issue. I have replaced both the main and T-con board. The only one left is the Power board. Before I spend another $55 on this thing, can someone tell me what to check so I can have a clue if the problem is the power board or not?
There is a picture of the power board on post #9.
Much appreciated.Comment
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Hi,
I’m trying to fix an HP EliteBook 840 G6 that stopped working after a lightning storm.
– Charger is OK and 19V is present at the motherboard.
– No charging LED, no fan, no reaction.
– I don’t see any 3.3V or 5V near the coils.
– Battery is unplugged.
– I’m 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
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