Tested power supply output getting 12 volts with no main board. Tested with main board 12 volt output is dipping appears that power supplies restarting. Hooked external load directly to 12 volt and it's doing the same thing. Suggestions?
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Insignia ns-55d420a16. Blinking red light no backlight
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Re: Insignia ns-55d420a16. Blinking red light no backlight
Try heating the electrolytic capacitors on the powerboard with a hairdryer, see if the voltages stabilize if only for a bit.Last edited by nomoresonys; 02-28-2021, 01:53 PM.
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Re: Insignia ns-55d420a16. Blinking red light no backlight
What load did you put on the 12V supply line. It says maximum 3 Amp. Does the 14V supply line also drop in line with the 12V ?Attached FilesLast edited by dick_barton; 02-28-2021, 01:54 PM.Willing to help but I'm no expert.
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Re: Insignia ns-55d420a16. Blinking red light no backlight
Originally posted by dick_barton View PostWhat load did you put on the 12V supply line. It says maximum 3 Amp. Does the 14V supply line also drop in line with the 12V ?
The board silkscreen showed 16v not 14, and its didn't match up with the connector so i assumed it was incorrect. I'm not getting any other voltage other than the 12 with or without the mainboard plugged in.
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Re: Insignia ns-55d420a16. Blinking red light no backlight
Look the solder joints over on the powerboard real closely, see if you have any bad/cold joints. As always be VERY CAREFUL when dealing with the DEADLY/HOT side of the board.Last edited by nomoresonys; 02-28-2021, 04:56 PM.
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Re: Insignia ns-55d420a16. Blinking red light no backlight
If your power supply matches the schematic then if the 12V is running so should the 14V (16V) because they are both derived from the same transformer T831
If that supply is missing then you need to double check all the components in that area.Willing to help but I'm no expert.
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Re: Insignia ns-55d420a16. Blinking red light no backlight
Data sheet FCH10A20: https://www.alldatasheet.com/datashe.../FCH10A20.html
Data sheet MBR10150CTF-E1: https://www.alldatasheet.com/datashe...150CTF-E1.html do those match up?
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