After disconecting video
from TV our tv did not turn on. The fuse is ok, when plugged in and switched on it does make a sound in the back like it normally does, but does not power up, no light, nothing at all.
I have removed the back and given it a clean/dust but still nothing.
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Re: TV will not switch on
This can be caused from numerous reasons, I will specift only the most common ones which doesn't require professional skills to deal with. The "easy" initial technical troubleshooting that can be performed, without a schematic and without a service manual, is using your DMM to make voltage readings and test components, also do a careful visual inspection and make not of any faulty or cracked solder connections around the high heat producing components and other pertinent details. Given the symptoms you
reported, it should be obvious that the areas of initial troubleshooting interest in the television circuitry are the main PS, B+ regulation, and B+ distribution, standby B+ , the HV and HOT area.... also pay attention to the and flyback derived B+ circuitry and components.
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Try plugging the TV into the AUX on the back of the receiver. If you get sound from the tv when you switch to AUX on the front of the receiver, then you know the tv is ok. You may also try connecting your CD player to the TV input on the back of the receiver, switch it to TV on the front of the receiver and if you have CD sound from the tv selector, then the receiver should be ok. Helps narrow down where the problem is. You may have to set the tv to enable its audio outputs in the TV's menu. It might not be putting out any sound until that setting is enabled.
Try the following troubleshooting steps.Check power cord and power outlet, possible light switch problem. Check if you TV savy check the P board if the P board is not good check the fuses on the P board. If the P board is OK check the A board. To check these Unplug the TV , Disconect A5 A6 and A7 on the A board and plug the TV in and see if you get a white screen if this is the case your P board should be OK.
replace pico fuse E994 and capacitor C707. You have to disconect alot of wires and remove the screws holding the boards. you DON'T have to remove the large high voltage wires. You have to stand the board on it"s edge to unsolder the components from the back side of board. Good luck it worked fine for me. [email protected] gene
switch tv on the switch can not contribute to that. unless the following goes fault
i switch getting fixed on one position(holding)
ii check power on a input of tv and input fuse
iii power supply, i have said that because if a power supply is ok, sound was going to be there.
Found that video 1 and video 2 switching does not work. The switching IC was HOT!. Then found a third video input works but no sound. Hooked -up sound output of DVD player to amplified loudspkr and it works, I hate to throw away a 2 year-old plasma TV when TV and cable still works.
Thanks for the offer anyway.