VIZIO VA26LHDTV10T has white vizio logo before pressing power on. no backlight.

**triplefour** · 06-20-2014, 08:23 AM

Re: VIZIO VA26LHDTV10T has white vizio logo before pressing power on. no backlight.

its a capxcon GF series
47uf
50v

hmm ok i took it out and put it on the meter but it seems like this capacitor is fine. 48uf and .33 ESR

guess id better still look up the datasheet to be sure

**selldoor** · 06-20-2014, 08:27 AM

Re: VIZIO VA26LHDTV10T has white vizio logo before pressing power on. no backlight.

For power supply capacitors irrespective of the "fine Print" on the existing capacitor which
may well be over optimistic anyway, you can just use Panasonic FR FM or FC whichever you can get in the size that will fit - FR is the best.
Re post29 That sheet is for an optocoupler so not an SMPS IC

**triplefour** · 06-20-2014, 08:29 AM

Re: VIZIO VA26LHDTV10T has white vizio logo before pressing power on. no backlight.

yeah according to

the cap has a max impedance (ESR as i am now told) of .20

so um.. .33 is actually no good? if its anything above 20, its bad? or is there some tolerance?

**triplefour** · 06-20-2014, 08:31 AM

Re: VIZIO VA26LHDTV10T has white vizio logo before pressing power on. no backlight.

selldoor, thanks i had a feeling that might not be the right sheet... can you help me find the correct one? i just kept coming up with that one

**selldoor** · 06-20-2014, 08:34 AM

Re: VIZIO VA26LHDTV10T has white vizio logo before pressing power on. no backlight.

Originally posted by triplefour

selldoor, thanks i had a feeling that might not be the right sheet... can you help me find the correct one? i just kept coming up with that one

SMPS may be IC902 part no?

**triplefour** · 06-20-2014, 08:34 AM

Re: VIZIO VA26LHDTV10T has white vizio logo before pressing power on. no backlight.

and well it looks like im going to have to buy at least 2 caps here.... should i just replace em all? that would be like 13 caps all together

**triplefour** · 06-20-2014, 08:35 AM

Re: VIZIO VA26LHDTV10T has white vizio logo before pressing power on. no backlight.

not sure what you mean but it says ET1103 on it and i could only find sheets for TCET1103

**aaronwt6** · 06-20-2014, 08:41 AM

Re: VIZIO VA26LHDTV10T has white vizio logo before pressing power on. no backlight.

No, what I'm saying is if you are sure the power supply is working and that the problem does indeed lie in the motherboard.

**triplefour** · 06-20-2014, 08:43 AM

Re: VIZIO VA26LHDTV10T has white vizio logo before pressing power on. no backlight.

took off another capacitor C931
elite EA(M)
100uf 50v

measures 93uf ESR .27

does the 7uf difference mean its bad already?
datasheet says should have a max impedence of .22

is .05 higher ESR a cause for failure?

**aaronwt6** · 06-20-2014, 08:43 AM

Re: VIZIO VA26LHDTV10T has white vizio logo before pressing power on. no backlight.

And I just robbed some out of a bad board I had lying around. But you may not have that option.

**triplefour** · 06-20-2014, 08:46 AM

Re: VIZIO VA26LHDTV10T has white vizio logo before pressing power on. no backlight.

wait aaron im still confused then. were you originally talking about replacing a capacitor on the mainboard, or the power supply?

**triplefour** · 06-20-2014, 08:47 AM

Re: VIZIO VA26LHDTV10T has white vizio logo before pressing power on. no backlight.

i think we already diagnosed that at the very least i have a power supply problem in the 12v/24v section ..lets hope i dont have a mainboard problem as well

**selldoor** · 06-20-2014, 08:52 AM

Re: VIZIO VA26LHDTV10T has white vizio logo before pressing power on. no backlight.

I am saying you are looking at the wrong IC - I only skimmed the thread and missed it but you mention IC902 on the first page!!

Here is the datasheet http://pdf1.alldatasheet.com/datashe...TR-A6069H.html
It is also useful to look at Google images for the part.

I am a bit worried about the voltages you posted initially and where you took them maybe it has already been mentioned but you need to be aware that voltage up the the bridge rectifier is AC and after that is it DC. I think you may not have been changing the meter or perhaps it is autoranging but clearly "62" on the mains fuse has to be wrong.

**budm** · 06-20-2014, 08:54 AM

Re: VIZIO VA26LHDTV10T has white vizio logo before pressing power on. no backlight.

Originally posted by triplefour

it says ET1103 or FT1103 (this is the 4 legged IC in the 12/24v)

Post 27:
"Just want to be sure nothing changed. Post 11, please get the P/N as printed on top of that SMPS IC for the 12V/24V so we can get the spec sheet and do the resistance and voltage test. Also check C941."
Again, you are not helping. As I indicated for you to see pictures on POST 11, I circled the 12V/24V SMPS IC which has 8 legs.
I am sorry I cannot help you if you are not going to follow the instructions.

**triplefour** · 06-20-2014, 09:02 AM

Re: VIZIO VA26LHDTV10T has white vizio logo before pressing power on. no backlight.

ughhh you meant the one on the underside of the board??? so sorry i thought u wanted the 4 legged one in the 12v/24 section on the front side!

i am just not familiar enough with the terms yet i guess. SMPS IC is supposed to mean something to me. and well..now it does.

the numbering is so tiny i dont think i can even read it. plus its kind of dirty. would it be safe to use a little rubbing alcohol to clean it? that wont take off the numbers will it?

**triplefour** · 06-20-2014, 09:04 AM

Re: VIZIO VA26LHDTV10T has white vizio logo before pressing power on. no backlight.

dangit why didnt i look at that second picture more closely???

**selldoor** · 06-20-2014, 09:07 AM

Re: VIZIO VA26LHDTV10T has white vizio logo before pressing power on. no backlight.

Yes it might clean with IPA gentle though perhaps with a Qtip
Suggest you dont post "Thoughts" the thread is going to be long enough without.
You could have used "edit

Sometimes a close up picture enlarged is easier than reading even with a magnifier
Try from different sides

**triplefour** · 06-20-2014, 09:07 AM

Re: VIZIO VA26LHDTV10T has white vizio logo before pressing power on. no backlight.

LD7258 is kinda what it looks like... but it could be 107258 or something like that...

**triplefour** · 06-20-2014, 09:09 AM

Re: VIZIO VA26LHDTV10T has white vizio logo before pressing power on. no backlight.

well it was more than a thought...it was part of an apology for not paying attention more closely to what budm was saying way back in post 11 but yes, you make a good point. keep it simple when possible. but sometimes, threads are gonna go long when you make mistakes and start naming numbers off the wrong chips! DOH

**triplefour** · 06-20-2014, 09:15 AM

Re: VIZIO VA26LHDTV10T has white vizio logo before pressing power on. no backlight.

LD7523AG i think now, after the alcohol bath

VIZIO VA26LHDTV10T has white vizio logo before pressing power on. no backlight.

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