Vizio E550i-a0 no turning on

[gfbjr52]

Re: Vizio E550i-a0 no turning on

I will try to get a picture posted. The boards are barely visible, and I've never posted an image to a forum before

[jetadm123]

Re: Vizio E550i-a0 no turning on

Board in question is probably the T-Con board. To post a photo: when you reply to a post, select "manage attachments" under the "Additional Options" section.

[gfbjr52]

Re: Vizio E550i-a0 no turning on

I haven't tried removing these yet. I want to make sure I can get them replaced before I venture into that

[johns1mj]

Re: Vizio E550i-a0 no turning on

I have the same tv. My tv powers on my backlight but no picture.
1,2 is 5.13
3,4,5 gnd
6,7 11.8
8,9 3.2
11-14 2.7
Voltages indicate everythings fine with the power board if I am reading correctly.

[budm]

Re: Vizio E550i-a0 no turning on

Do you have 12Vdc at both ends of the SMD fuse on the T-CON board with ref. to the chassis GND?

[CapLeaker]

Re: Vizio E550i-a0 no turning on

water damage... that sux... problem is you just can't switch out that board, because it is tab bonded to the panel.

[vinceroger69]

Re: Vizio E550i-a0 no turning on

water damage... that sux... problem is you just can't switch out that board, because it is tab bonded to the panel.

Good on spotting that i missed it the first time i glanced at the pictures but as you say fluid damage usually un fixable requires a new lcd.

[CapLeaker]

Re: Vizio E550i-a0 no turning on

Good on spotting that i missed it the first time i glanced at the pictures but as you say fluid damage usually un fixable requires a new lcd.

I sat on my computer, not on my tablet, so I was actually able to see something.

[vinceroger69]

Re: Vizio E550i-a0 no turning on

same as too be honest on my laptop now so can see a lot more tablets/phones are good but cant beat a laptop or pc at times.

[johns1mj]

Re: Vizio E550i-a0 no turning on

Installed a used pcb/main board. It took care of my issue.

[Hrs_tvgurus]

Re: Vizio E550i-a0 no turning on

I have same model with no stby light & only voltage I have is on pins 1-2 5.16 stby No voltage on any other pins even when I hit power command. Safe to assume I need a main. Thanks

[liberatorx2]

Re: Vizio E550i-a0 no turning on

I have the same tv that will not turn on. When I looked at the power board I found part ic901 had the corner chipped off ? Cant read the actual # on the part cause of the chip missing. Does anyone know what part this is ? Could it cause the tv to not power on ?

[liberatorx2]

Re: Vizio E550i-a0 no turning on

Sorry , its a vizeo E550i-b2E

[Louis82]

Re: Vizio E550i-a0 no turning on

Please provide the part number that is printed on your board. I might have it.

[Larry_Ellison]

Re: Vizio E550i-a0 no turning on

Good evening and pardon me for jumping on this thread. Since the pictures are already here I thought I would ask a question someone may know the answer to. I'm having a heck of a time finding a schematic. Connection CN103 (4pin on right above main a/c plug) on the power supply is connected to connection JP3 (4pin just above speaker connector) on the main board. Can anyone tell me what this circuit is on the main board that is being provided power to? Is it the audio circuit?

Thank you in advance.

[budm]

Re: Vizio E550i-a0 no turning on

Good evening and pardon me for jumping on this thread. Since the pictures are already here I thought I would ask a question someone may know the answer to. I'm having a heck of a time finding a schematic. Connection CN103 (4pin on right above main a/c plug) on the power supply is connected to connection JP3 (4pin just above speaker connector) on the main board. Can anyone tell me what this circuit is on the main board that is being provided power to? Is it the audio circuit?

Thank you in advance.

That 18V connector is for supplying the Voltage to run TI chip UA3 Class D amplifier.

[nightstah]

Re: Vizio E550i-a0 no turning on

'8(remote on/off): 0v' The main board is not sending the ON (PS-ON same as remote on/off) command to turn on the rest of the power supply.

Firstly, apologies for reviving an old thread. That said? I wanted to specifically thank you. I had the same issue with the same set that recently came into my possession. Standby voltage only, all others 0V.

I'm personally grateful you outlined the order of operation. It allowed me to avoid erroneously ordering a power board and instead a main board. $22 fix, the previously dead TV sprung to life.

[karthur]

Re: Vizio E550i-a0 no turning on

'8(remote on/off): 0v' The main board is not sending the ON (PS-ON same as remote on/off) command to turn on the rest of the power supply.

I was given a set because it "wouldn't come on". The model no is E550i-A0e.

When I checked the power board, I had 0vdc on pin 8 (remote on/off). I replaced the main board (3655-0642-0150). Got it for less than $20 of ebay.


Not bad for a $20 TV.