Vizio e500i-b1 no turn on standby light fades out in 5 sec.

[snake91876]

The TV has a standby light for about 5 seconds after I plug in. Then it fades out. I can make it come back on by pressing power button then stay fades back out after 3-5 seconds. Have 5v on power supply but no other of the 12 or 24v. Is this a main board problem I'm stumped. PS has power at bridge and large caps.

[budm]

Re: Vizio e500i-b1 no turn on standby light fades out in 5 sec.

Please read basic troubleshooting guide in my link below. You will need to provide good clear pictures of the whole backside of the TV showing all the boards, then take the DCV reading when TV is OFF and when Power switch is activated on the connector of the power supply that goes to the main board.
Make sure to put the pin names follow by the DCV reading for each pin so we will know what each pin's function is and what Voltage/s is/are missing.

[snake91876]

Re: Vizio e500i-b1 no turn on standby light fades out in 5 sec.

On plug to main board I have 5v on two top pins and no other voltage in standby. Stby light fades off after 4 secs. When I press power on I get 2.9v at ps on and the voltage on the two 12v pins climbs to 1v and no other voltage present on 24v pins.

[snake91876]

Re: Vizio e500i-b1 no turn on standby light fades out in 5 sec.

I'm leaning toward power supply what do u think

[CapLeaker]

Re: Vizio e500i-b1 no turn on standby light fades out in 5 sec.

I am thinking this: You may have a bad main board and a bad PSU. When the LED goes out, you still have 5V on the STBY voltage rail. That indicates a problem with the main board.

The PSU problem I am trying to understand. PSon is good, however you didn't report the on/off pin (BLon) voltage.

Check the DC V on the main filter capacitor in the primary.

[snake91876]

Re: Vizio e500i-b1 no turn on standby light fades out in 5 sec.

Both main filter caps 163v in stby and on.
Stby light on 4 seconds after plug in then fades, I have a 1 sec flash of Stby light when I press power on button. I have 3v at ps on and 3v on on/off at power supply constant after I press power on, but only 1v on 12v pins and 0v at 24v pins. The 3v remain on both pins until I press power off then the go to 0v. I'm leaning power supply but the Stby light thing has me confused.

[dick_barton]

Re: Vizio e500i-b1 no turn on standby light fades out in 5 sec.

It looks like there's no PFC coming on. When you come out of standby you don't appear to have a boost voltage across the capacitors.

The photo of the power supply is quite blurred so difficult to identify components. What is the part number for the multi-legged IC under the heat sink close to the word "primary"

[snake91876]

Re: Vizio e500i-b1 no turn on standby light fades out in 5 sec.

It is ic9101

[snake91876]

Re: Vizio e500i-b1 no turn on standby light fades out in 5 sec.

Power supply

[dick_barton]

Re: Vizio e500i-b1 no turn on standby light fades out in 5 sec.

Not the board ident but the actual part number written on the IC. It looks like an STR-xxxx type of IC

[snake91876]

Re: Vizio e500i-b1 no turn on standby light fades out in 5 sec.

I'll have to unsolved heat sink but I may have found the problem, a buy ideas of what to replace I got a bunch of parts boards

[budm]

Re: Vizio e500i-b1 no turn on standby light fades out in 5 sec.

I'll have to unsolved heat sink but I may have found the problem, a buy ideas of what to replace I got a bunch of parts boards

It looks like some one has accidentally touch the trace (HOT) to the chassis GND trace (a piece pf metal, screws?). Those blue caps are not needed for the TV to function.
Art this point you need to get the PFC Boosted Voltage to work first.
Pictures of the power supply board are too blurred for me to read the designators and the labels on the board.
We need good clear straight shot pictures of the top and bottom side of the board because I need to locate the PFC diode on that board.
BTW, I cannot read the numbers on the barcode sticker.

[snake91876]

Re: Vizio e500i-b1 no turn on standby light fades out in 5 sec.

Pics

[snake91876]

Re: Vizio e500i-b1 no turn on standby light fades out in 5 sec.

Pics

[budm]

Re: Vizio e500i-b1 no turn on standby light fades out in 5 sec.

Vizio ADTVE3613XA6 Power Supply Unit
https://www.shopjimmy.com/vizio-adtv...pply-unit.htm#

Check the resistance between the two outer legs of the bridge diode BD9801.

Pictures provided by shopjimmy.

[snake91876]

Re: Vizio e500i-b1 no turn on standby light fades out in 5 sec.

Reads open one way and 4.3 the other way on 20K setting or 361 in 2000 range

[budm]

Re: Vizio e500i-b1 no turn on standby light fades out in 5 sec.

Reads open one way and 4.3 the other way on 20K setting or 361 in 2000 range

361 Ohms in 2K range one way, and open in 2K range, is that right?

[snake91876]

Re: Vizio e500i-b1 no turn on standby light fades out in 5 sec.

That's what I get I'll double check in a few mins

[snake91876]

Re: Vizio e500i-b1 no turn on standby light fades out in 5 sec.

On bd9801 outside legs I get no reading or open one way and 366 the leads reversed with meter in ohms on 2000 range

[budm]

Re: Vizio e500i-b1 no turn on standby light fades out in 5 sec.

OK, that is fine, I am looking for resistance of <1K in both directions if it is bad.
More troubleshooting needed in that PFC section then.