Sony XBR 55 x800e

[thekidtmac73]

I have 3.3 volt standby on the flowers Provo power supply board until I plug it into the main board but then it fluctuates the point .3 to.5 please help

[diif]

Re: Sony XBR 55 x800e

What's the resistance to ground on the 3.3v pin on the mainboard?
Decent photos always help. I suspect a shorted component, possibly a capacitor.

[R_J]

Re: Sony XBR 55 x800e

If you have about an 8Ω ~ 10Ω 1watt resistor, disconnect the main board and connect it between the power supply 3.3vstby and ground and see if the 3.3v stays up.
This should tell you if the power supply is providing enough current or if the main board is loading it down.

[thekidtmac73]

Re: Sony XBR 55 x800e

This I what I have video attached

[thekidtmac73]

Re: Sony XBR 55 x800e

I disconnected the main board from the power board and when I test the rating on a standby voltage it is still the same as when it is plugged in

[thekidtmac73]

Re: Sony XBR 55 x800e

This with main board connected

[thekidtmac73]

Re: Sony XBR 55 x800e

This is with that main board no connected

[CapLeaker]

Re: Sony XBR 55 x800e

I’d say first off we need straight shot high resolution pictures of your PSU and the main board. Then do that what already has been asked.

[thekidtmac73]

Re: Sony XBR 55 x800e

Where am I looking for the 8Ω ~ 10Ω 1watt resistor? I'm new at this.