Magnavox 42mf230a/37

[84TAVeRT]

it just stopped working last week...

no picture no sound

led is red, push power button on remote or tv and led turns blue... have to unplug to turn off

checked the y-sus and buffers for short both passed as non-short

found a bulging cap on the y-sus and replaced it (no change)

started checking voltages today...

1. Check PowerSTB5V（U516 3PIN）
Voltage: 5V (shows 4.95v)

2. Check the REL-SW state of power IO
interface，
High Voltage：Turn on
Low Voltage：Standby
Test Point： C pole of Q5
High Voltage：5V（4.2---5.3V）
Low Voltage：0V

I get 0 volts, so i am not coming out of standby

what should i check next, this is my first plasma project...

thanks,
chris

[84TAVeRT]

Re: Magnavox 42mf230a/37

found another bulging cap on the main power supply

also discovered fuse f5004 is blown on the y-sus

[84TAVeRT]

Re: Magnavox 42mf230a/37

components replaced...

no apparent power on secondary side of main power board...

what now?

[84TAVeRT]

Re: Magnavox 42mf230a/37

btw, f5004 was not blown...

[tom66]

Re: Magnavox 42mf230a/37

Can we see some pictures?

[Rhymemeister]

Re: Magnavox 42mf230a/37

it just stopped working last week...

no picture no sound

led is red, push power button on remote or tv and led turns blue... have to unplug to turn off

checked the y-sus and buffers for short both passed as non-short

found a bulging cap on the y-sus and replaced it (no change)

started checking voltages today...

1. Check PowerSTB5V（U516 3PIN）
Voltage: 5V (shows 4.95v)

2. Check the REL-SW state of power IO
interface，
High Voltage：Turn on
Low Voltage：Standby
Test Point： C pole of Q5
High Voltage：5V（4.2---5.3V）
Low Voltage：0V

I get 0 volts, so i am not coming out of standby

what should i check next, this is my first plasma project...

thanks,
chris

I also have a 42inch Magnavox plasma I picked up for twenty dollars. It looks brand new inside and out but no power.I replaced the power board and another smaller power board but it just does nothing like it isn't even plugged in. There is power to the inlet, I know. All fuses check okay. but no power, no indicator light, nothing, Can anyone help?

[tom66]

Re: Magnavox 42mf230a/37

Is the model of your TV the same? Regardless, it would be best to create a new thread.