I got this Tv in the shop today with no power, no backlights, and no sound. The customer said possible lightning strike. Voltages were not there on the PS and no response on the remote so I ordered the whole kit. I put in a new Main board and PS when I plugged it in I got a high pitch squeal from the transformer on the PS. I sent the whole kit back to SJ. Would a bad panel cause this? I've fixed this noise with cap kits or a few bad diodes nearby in the past so I'm hoping I just got a bad kit from SJ.
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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... -
I've got a monitor on my workbench at the moment that makes a high pitch squeal (that I cant hear as my ears are too old) when you power it on and lasts a couple of seconds before quitening and apparently it can be heard at regular intervals whilst on.
On opening up the monitor and looking at the PCB the usual suspects showed their heads so I have already replaced all the electrolytic capacitors.
The other issue that was reported with this monitor was the fact it took ages to start displaying anything after pressing the power button.
What component(s)... -
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 guys,
Any one has Emerson industrial PSU schematic, it has 3 electronics cards in one package please have a look at pics -
Good afternoon. I found this forum as I was looking for troubleshooting information for my Sony z9d. A lightning strike hit very close to the house and did nearly $30,000 in electronics damage. The TV appears completely dead with no status light and no picture. I found the Sony XBR-65Z9D service manual and followed the troubleshooting steps on Pages 21-26. All checks seem normal except DC_OFF_DET check on Page 23 R420 voltage was slightly higher than 3V. It was 3.475V and C418 was slightly higher that the 5V at 5.3V.
I proceeded to check the Power Board CN6401 connector. With all...