Toshibia 40rv525u Green Blinking light and questions about Caps!!

[ComputerGeek]

Whoops my post went in after you Checking now.

[ComputerGeek]

OK just Checked them, I have 119v coming in on the 120v line and both these caps measure 163v. Took me a second to realize I had to set my meter to DC. Thanks!

[tom66]

Your power board is full of high quality "Japcaps" (Japanese capacitors.) These rarely fail. I have never seen a failed Chemicon KY and they are most likely not your problem. I have only ever seen one failed Rubycon, on this forum, but it was most likely due to the failure of some poor quality "Elite" capacitors on the power supply. Generally with bad caps the output voltages become low (too low for operation of the TV) but they are *not* zero.

I can't remember - did you check all the diodes?

Check the two diodes I have highlighted (black) with TV unplugged using the diode test mode.

Check the pink resistor I have highlighted - should appear close to zero ohms.

[ComputerGeek]

I checked the three main diodes on the big heatsink on the secondary side. That was all.

The two diodes measure 482 one way and out of range the other way.

The Pink Resistor Measures 2 ohms.

Thanks!

[tom66]

Originally Posted by ComputerGeek

I checked the three main diodes on the big heatsink on the secondary side. That was all.

The two diodes measure 482 one way and out of range the other way.

The Pink Resistor Measures 2 ohms.

Thanks!

Hmm. 2 ohms seems quite high. What do your multimeter probes measure when touched together?

[ComputerGeek]

Checked again with the Craftsman meter.

And Got 1.4 Ohms. Probes touched together measured 0.6 so I am assuming that its around 0.7-0.8 Ohms

[tom66]

Originally Posted by ComputerGeek

Checked again with the Craftsman meter.

And Got 1.4 Ohms. Probes touched together measured 0.6 so I am assuming that its around 0.7-0.8 Ohms

That seems more reasonable. Still a bit high, but probably okay.

Do you have a photo taken from an angle looking underneath the primary heatsink? (The one near the big caps.)

I suspect your switching controller is bad, but let's see if there are any hidden fuses under there.

[ComputerGeek]

Post Number 28 should Cover you I think.

http://www.badcaps.net/forum/showpos...5&postcount=28

Let me know if you need another shot.

[ComputerGeek]

I allready tested the main Fuse are there usually others on a SMPS?

[tom66]

Originally Posted by ComputerGeek

I allready tested the main Fuse are there usually others on a SMPS?

Yes, I had an LG LCD with a separate one for the main and standby supplies.

[ComputerGeek]

Are these Pictures OK?

Post Number 28 should Cover you I think.

http://www.badcaps.net/forum/showpos...5&postcount=28

Let me know if you need another shot.

[tom66]

Originally Posted by ComputerGeek

Are these Pictures OK?

Post Number 28 should Cover you I think.

http://www.badcaps.net/forum/showpos...5&postcount=28

Let me know if you need another shot.

Do you have any of the top side?

[ComputerGeek]

Are the ones here ok? If not what area do you need a close up of?

http://www.badcaps.net/forum/showpos...52&postcount=1

[tom66]

Originally Posted by ComputerGeek

Are the ones here ok? If not what area do you need a close up of?

http://www.badcaps.net/forum/showpos...52&postcount=1

Underneath the heatsink on the side near the big caps but on the side with the components (not the green side.)

[ComputerGeek]

Theres only two caps under there, as far as I see heres a photo, I also grabbed one of another area I thought might be helpful. Thanks!

[ComputerGeek]

Are those photos ok?

[tom66]

They're good. Nothing important unqder the heatsinks. That's disappointing, I was hoping to see a fuse or something like that.

What are the part #'s on the chips on the bottom?

[ComputerGeek]

OK i am assuming you want the black Smd chip on the bottom of the board?

Also when looking at the picture Vs101 and VS102 in the first picture of post 115 look discolored is there a way to test those? Thanks!

[ComputerGeek]

A picture is worth a thousand words of here you go. THnaks!

[tom66]

Okay, check the voltage between these two pins with PSON both high and low using the resistor.

You should get around 9 to 16V if it is working okay, typically when PSON is high. When PSON is low, it might drop below 9V. If the voltage here isn't high enough, it points to a problem in the pre-charge or the standby power part.