Samsung won't power up ln32a450c1d

[newtothis]

Re: Samsung won't power up ln32a450c1d

Did all the other voltages (EG 24v 12v etc) come up when you jumped the PSU on?

Power button won't do anything as the main is disconnected

[simcole]

Re: Samsung won't power up ln32a450c1d

Did all the other voltages (EG 24v 12v etc) come up when you jumped the PSU on?

Power button won't do anything as the main is disconnected

The new main board fixed the problem. I very closely inspected the main board for a short or bad solder joint to see if I could repair it. I found nothing and I hate to throw it away, but that's what I did. It's fixed and working again now. Thanks for all the help everyone.

[MacAddict]

Re: Samsung won't power up ln32a450c1d

newtothis - I have always been getting power out but something was causing the power to reboot after 10-12 seconds. Once the main board was disconnected the cycling stopped. So there must be something on the main that is causing the restart.

simcole - Good to hear your replacement board worked. Since my board is identical to your old one and mine needs to be replace can I ask where you got it and what is the part # you bought. When I looked up my board none were available.

[alfonsoreyesd]

Re: Samsung won't power up ln32a450c1d

i just successfully finished to repair this tv ln32a450c1d at the beginning i though it was only capacitors,, well i replaced all of them including the big square one and still nothing only red light and wont power on ,, but thanks God and your posts i found weird values when i test transistors, so i decide to replace the two fqpf5n50c,, took me a while to repair it but i got it done !!!

[Terryfictv]

Re: Samsung won't power up ln32a450c1d

The new main board fixed the problem. I very closely inspected the main board for a short or bad solder joint to see if I could repair it. I found nothing and I hate to throw it away, but that's what I did. It's fixed and working again now. Thanks for all the help everyone.

Had you researched the main board repair, C102 and C131 would normally be the problem. They are found on "A" line mains like your LN32"A" Model.
I use 47@10v tantalum capacitors. I fixed a 40",46" and 52" recently, all
A line Models.

[budm]

Re: Samsung won't power up ln32a450c1d

You can try paralleling the cap for testing.
https://www.badcaps.net/forum/showpo...&postcount=129

[MacAddict]

Re: Samsung won't power up ln32a450c1d

Terryfictv - I could not find C102 or C131 on the main board. I do not have a schematic for the BN97-00963A and all of the components seem to be in the 1000s or more. Can you give me a little more direction.

[Terryfictv]

Re: Samsung won't power up ln32a450c1d

Terryfictv - I could not find C102 or C131 on the main board. I do not have a schematic for the BN97-00963A and all of the components seem to be in the 1000s or more. Can you give me a little more direction.

Did you complete this repair ?

[williesaints]

Re: Samsung won't power up ln32a450c1d

This schematic of the power supply might help. Are you getting the PS_ON voltage at pin 1 of CNM802 on the power supply board?

thank you for the diagram