vizio E470VL unusual question

[jgrice53]

I have a vizio E470VL that a customer brought in that is dead. no response from the power button, only the vizio logo goes to orange when plugged in. 5v standby is only voltage on power supply connector. all fuses are good. The HDMI ic on the mainboard is blistering hot to touch. Question, would removing the HDMI ic allow the tv to turn on, and would an over-heated HDMI ic keep a tv from operating?

[budm]

Re: vizio E470VL unusual question

The HDMI IC may be locking up the processor so it will not allow the processor to function, that is the only thing I can think of. You can try removing the IC, unless we understand exactly how HDMI IC communicate with the processor, we cannot tell if removing the IC will allow the board to work again or not.

[jgrice53]

Re: vizio E470VL unusual question

there is another post about this model with the same problem and someone suggested that the hdmi is not plug and play and if treated as plug and play could cause this condition.

[jgrice53]

Re: vizio E470VL unusual question

i am having trouble locating another main board so I was wondering if i just remove the ic and see if the tv would work

[jgrice53]

Re: vizio E470VL unusual question

this is from a post "Re: Vizio E470VL Orange Light/No Power"

It wont be of help to you but did you treat the hdmi sockets as plug and play
and plugged in the roku when either was stitched on?
I have been warning people that hdmi is not plug and play due to the number of cases on here where it stuffs the main/logic board.

[ecking767]

Re: vizio E470VL unusual question

I will say yes a burn HDMI chip can cause a TV not to power on.

I pick up two Vizio last week the seller claim that both TV's wouldn't power on after a bad power outage surge.

the first TV Vizio E370VL, got it home and remove the back of the case to find no burn chips or blown fuses. plug the power cord in and I got a orange light on the front "Vizio logo" press the power button and nothing. I was leaning toward the EPPROM being bad but I remember what the seller said. So I touch the main CPU chip and then the HDMI chip. the main cpu chip was cold but the HDMI chip was warm to the touch with no signal being inputted. I check the HDMI chip under magnification and saw a little black ball near the corner of the chip.

So I started to remove the HDMI chip with a hot air gun and that when I can smell that "burn out smell"

after the chip removal the TV power up fine now.

[jgrice53]

Re: vizio E470VL unusual question

I am going to remove the HDMI IC and see what happens. Like you, with no input the IC is too hot to touch. After removing if the TV works or the symptoms change at all I will order a replacement HDMI IC and install it. Mouser has them for $4.90 plus shipping of about $5

[stj]

Re: vizio E470VL unusual question

just make sure you remove it cleanly,
ecking767 damaged the pcb and ripped a load of tracks up!

[jgrice53]

Re: vizio E470VL unusual question

yeah it will be a bit of a challenge because it is such a small IC. I use CHIPQUIK so hopefully I can get it off without any problems.

[stj]

Re: vizio E470VL unusual question

i dont think you can do it.
looking at that fucked-up mess, i think the chip has a base-tab soldered to the board in the center.

i think it needs a hot-air unit.

[stj]

Re: vizio E470VL unusual question

actually, i'm 100% sure it does on second look

[jgrice53]

Re: vizio E470VL unusual question

His is a P13HDMI 301ZLE which is a square IC. Mine is a P13HDMI 245AZLE which is a rectangle IC. I've looked at the data sheet on these and it does appear to have base-tab, so I will be using a hot air gun to remove it.

[jgrice53]

Re: vizio E470VL unusual question

I will take before and after pcs and post them

[ecking767]

Re: vizio E470VL unusual question

just make sure you remove it cleanly,
ecking767 damaged the pcb and ripped a load of tracks up!

I didn't ripped up the traces intentional, the thermal pad on the IC chip was fused to the board caused by the power surge, I have CHIPQUIK,and it wasn't any help in this case.I had my hot air gun temp up high, is wasn't having any affect on the chip being remove with ease.

http://www.ernestos-electronics.com/...-azle-ic-chip/

you can buy the chip with in the US. if needed

[jgrice53]

Re: vizio E470VL unusual question

So the TV is working without installing a new IC? guess the traces were not damaged too badly. What input can you use on the TV now without the HDMI IC on the board?

[ecking767]

Re: vizio E470VL unusual question

So the TV is working without installing a new IC? guess the traces were not damaged too badly. What input can you use on the TV now without the HDMI IC on the board?

yes the TV works on all other inputs: TV, AV,and COMPONENT 1 & 2

no, the traces are damage and the thermal pad for the IC chip is destroy.This board can't be repaired using the HDMI ports

[jgrice53]

Re: vizio E470VL unusual question

That's good to hear. I will remove it tomorrow and post my results.

[jgrice53]

Re: vizio E470VL unusual question

Well, I got the HDMI IC removed but the TV is still dead.

[stj]

Re: vizio E470VL unusual question

one pad is loose and looks like it's touching another in the 4th foto.
and in the 5th foto it looks like the other chip ower-left has bridged pins - may just be the foto but check.

[DLinkOZ]

Re: vizio E470VL unusual question

Also looks like at least one resistor went on walkabout (R727).