Home |
Search |
Today's Posts |
|
Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
Reply |
|
LinkBack | Thread Tools | Display Modes |
#1
Posted to sci.electronics.repair
|
|||
|
|||
Norcent 42" Plasma TV
Someone recently brought in a Norcent PT4235 plasma TV. It had apparently
"just quit". When I plug it in, the relays click a couple of times like it's trying to start, and a bit of static flashes on the screen, but that's it. I looked under the back cover and didn't see any bulged or leaking caps, nor did I find any obvious shorts in the many high-wattage transistors. Before I go any further with this, I'd like to know if there are any known issues that someone could point me to. This set has a massive number of power supplies in it, and I really don't want to waste several hours on something that may not be fixable in the first place. This is a very cheap brand of set (retailed for just $700 new), so I doubt it's worth spending much time on. Thanks for any advice. |
#2
Posted to sci.electronics.repair
|
|||
|
|||
Norcent 42" Plasma TV
"Chris F." wrote in message
... Someone recently brought in a Norcent PT4235 plasma TV. It had apparently "just quit". When I plug it in, the relays click a couple of times like it's trying to start, and a bit of static flashes on the screen, but that's it. I looked under the back cover and didn't see any bulged or leaking caps, nor did I find any obvious shorts in the many high-wattage transistors. Before I go any further with this, I'd like to know if there are any known issues that someone could point me to. This set has a massive number of power supplies in it, and I really don't want to waste several hours on something that may not be fixable in the first place. This is a very cheap brand of set (retailed for just $700 new), so I doubt it's worth spending much time on. Thanks for any advice. It's a slim shot, but you might try (when powered down) measuring resistance from the output side of all voltage regulators and rectifiers looking for a short to ground. (Often the rectifiers are TO-220 packages). Saved my ass once recently. A Samsung plasma with power supply issues - and the board no longer available from Samsung. Robbed a TO-220 rectifier of the same type off a scrap board. Mark Z. |
#3
Posted to sci.electronics.repair
|
|||
|
|||
Norcent 42" Plasma TV
On Wed, 28 Apr 2010 10:45:36 -0700, "Chris F."
wrote: Someone recently brought in a Norcent PT4235 plasma TV. It had apparently "just quit". When I plug it in, the relays click a couple of times like it's trying to start, and a bit of static flashes on the screen, but that's it. I looked under the back cover and didn't see any bulged or leaking caps, nor did I find any obvious shorts in the many high-wattage transistors. Before I go any further with this, I'd like to know if there are any known issues that someone could point me to. This set has a massive number of power supplies in it, and I really don't want to waste several hours on something that may not be fixable in the first place. This is a very cheap brand of set (retailed for just $700 new), so I doubt it's worth spending much time on. Thanks for any advice. A common cause of this problem is a shorted sustain card. This appears to use an LG panel. One troubleshooting method on these panels is to unplug the TV, disconnect the cable linking the power supply to a sustain card, then plug the TV in again and see if the power supply turns on. If that didn't help,disconnect the next sustain card. PlainBill |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
Gateway (blech) plasma "displays offscreen" | Electronics Repair | |||
NEC plasma TV: what's the cause of image "solarizing"? | Electronics Repair | |||
Norcent LCD TV. | Electronics Repair | |||
Advice on "breaking in" a new Panasonic plasma TV | Electronics Repair | |||
Norcent LCD. | Electronics Repair |