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Equipment Repairs => LCD TV forum => Topic started by: vmartin on August 25, 2011,18:34:24

Title: What can i do with flashing tv (power board: 04TA069I)
Post by: vmartin on August 25, 2011,18:34:24

Hello,
I have TV Schnieder LDT 3205 with power board 04TA069I. After a few minutes TV screen and LED diode begins to flash. Where can be mistake?
I can measure 115V on a radiator in the center of board and 100V on a frame.
I have got no scheme. What could be wrong?
Thank you for all ideas.

Title: Re: What can i do with flashing tv (power board: 04TA069I)
Post by: dougc on August 25, 2011,18:50:16

Hi, Look for bulging capacitors on the secondary side.

Title: Re: What can i do with flashing tv (power board: 04TA069I)
Post by: vmartin on August 25, 2011,19:04:18

Thank you very much. Do you think that transistors are good?

Title: Re: What can i do with flashing tv (power board: 04TA069I)
Post by: dougc on August 25, 2011,19:16:30

with regard to that particular fault I haven't had any transistor problems, Check all the caps at the top right hand side of board, Regards, Doug

Title: Re: What can i do with flashing tv (power board: 04TA069I)
Post by: dougc on August 25, 2011,19:25:52

Just a thought, If the screen lights up initially then the set shuts down resolder connections on supply sockets to inverter - it could also be a faulty inverter.

Title: Re: What can i do with flashing tv (power board: 04TA069I)
Post by: vmartin on August 26, 2011,05:48:00

Thank you for ideas. Do you think invertor on the right side? (27mH)
http://tvpartsfixit.co.uk/Images/Parts/286.jpg

Title: Re: What can i do with flashing tv (power board: 04TA069I)
Post by: vmartin on August 26, 2011,06:59:20

I disconnected all cables and the voltage (100V) is still on the board. Is it ATX supply?
Thank you :-)