Hello, said tv was working fine this morning, came home this evening to find the tv will not come on. The only thing i can go by is the red LED is blinking rapidly. I can only describe the blinking would be like morse code or something, rapid with no distinct pattern. I did take the back cover off, i didnt see any bad capacitors or anything like that however i think there is a burnt spot on the board, i dont know if its burnt or not. I can upload a pic of the board if it helps!
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Samsung pn51d450a2dxza rapid blinking LED
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Re: Samsung pn51d450a2dxza rapid blinking LED
correction, its not a burn spot, but is there anything i can try to do before buying a new power supply? Im looking for a replacement power supply now.
edit: also, there is no clicking noise when i try to turn it on or when i plug it in the power outlet at the wall.Last edited by cprime; 07-18-2015, 07:51 AM.
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Re: Samsung pn51d450a2dxza rapid blinking LED
Originally posted by Hamie View PostFirst of all disconnect the ysus and zsus.
Plug in the TV, if it turns on then the chances are you don't have a faulty power supply.
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Re: Samsung pn51d450a2dxza rapid blinking LED
Originally posted by Hamie View PostWhat boards did you unplug?
This is why pictures are important.
We need to see the whole assembly and the way the boards are linked up.
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Re: Samsung pn51d450a2dxza rapid blinking LED
I cannot see any pictures. Can you upload them using the "Manage Attachments" feature on this site - it's just below the post reply window...Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.
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Re: Samsung pn51d450a2dxza rapid blinking LED
OK. Disconnect the power connector between the main board (HDMI and other video ports) and the power board (has the mains power input) - Disconnect it on the main board side so it is still attached to the power board.
Take a wire jumper and connect the pins marked PS_ON and GND together. (Refer to the pin legend on the power or main board.) On the CONTROL board, the green board in the centre of the set, there is a little 4 pin header in a 2 x 2 square. The pins are numbered. Connect pins 3 and 4.
Then plug the TV into power. The TV should turn on and show a sequence of patterns. Do these look OK?Last edited by tom66; 07-18-2015, 10:47 AM.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.
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Re: Samsung pn51d450a2dxza rapid blinking LED
ok, i didnt have a wire jumper, but i did just use a piece of copper wire (speaker wire i think) to try to connect PS_ON and GND together just by touching them together( was difficult), i used a hard drive jumper for the control board. plugged the tv in and nothing, no led just dead.
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Re: Samsung pn51d450a2dxza rapid blinking LED
Of course, we mean from PS ON to GND. So change the exact position as appropriate. Don't just jump two neighbouring pins
Both connections need to be in place while the set is powered on. It's not enough to make the temporary connection only or the TV will turn off.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.
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