Panasonic TC-P55ST30 one led blink

[smai]

TV used to start up fine then i had to unplug it for a while to get it to start now nothing and one blink

i cant find the manual for this actual model but i did for TC-P55GT30 it shows one led blink means

Panel information SOS
LP1 Start SOS

but doesnt really tell me which board to start with what does it mean ?

any thoughts or have you seen this before ?

[tom66]

Re: Panasonic TC-P55ST30 one led blink

"A" board, usually.

[Frank3y3]

Re: Panasonic TC-P55ST30 one led blink

So, did you had the time to take a look or test anything else concerning your 1 led blink ?

[tw2005]

Re: Panasonic TC-P55ST30 one led blink

TV used to start up fine then i had to unplug it for a while to get it to start now nothing and one blink

i cant find the manual for this actual model but i did for TC-P55GT30 it shows one led blink means

Panel information SOS
LP1 Start SOS

but doesnt really tell me which board to start with what does it mean ?

any thoughts or have you seen this before ?

Here's something i do all the time, use the find function in the PDF reader and search LP1, you would find it located on the A-board which Tom has already mentioned.

IC9300 LP1 which loads data from the SPI Flash IC9304. I have had a 1 blink on a 2010 board and by chance discovered a bad SPI Flash triggered the 1 blink.

I guess either faulty flash or corrupted data in my case. Faulty IC9300 could do it too I expect.

With my 2010 model i could isolate all the other boards and ribbons from the A and it would power up normal or in my case 1 blink remained which proved it was an A board issue.

I don't think with these later ones that would prove anything as the troubleshooting guide says 3 fast blinks would occur.

As for a manual,

or check out the stickys, TV repair reference library under TOM66 who has a site with a collection of manuals.

There's a 2012 ST50 guide here http://www.tgohome.com/ServiceManual...h=Submit+Query

[smai]

Re: Panasonic TC-P55ST30 one led blink

no i have time today to open it up, i did find exact the service manual for this model, and thanks tom66 and tw2005 for your input guys

[smai]

Re: Panasonic TC-P55ST30 one led blink

soo whats the difference between all these boards ? mine is TNPH0912 with AB as the suffix? can i replace it with the same board but with AF as the suffix ?

[smai]

Re: Panasonic TC-P55ST30 one led blink

okay i figured out i have AD, but does this mean i can switch it with any board as long as i change the resistors to match AD? does anyone know what these resistors are actually doing from model to model ?

[tw2005]

Re: Panasonic TC-P55ST30 one led blink

okay i figured out i have AD, but does this mean i can switch it with any board as long as i change the resistors to match AD? does anyone know what these resistors are actually doing from model to model ?

No. Don't think those jumpers do anything. The one you mention is 65", eeprom/flash data will be different for the size

[smai]

Re: Panasonic TC-P55ST30 one led blink

got a new A board plugged it in, now 7 blinks points to the SU SD board

did the jumper test, powered on, no blinks so that clears the SC board

i cant seem to find a way diagnosis just the su or just sd board any tips?

and are the SD/SU boards interchangeable between models or different versions of the same tv i need TNPA5340 but found TNPA5340AK they have different pany part numbers

and a final thought the A board i got is damaged (see pics) you think it will be okay or should i have the seller replace/return it (and im pretty sure i need an A board i put the old one back in and tried the jumper trick from earlier and still only 1 blink )

[smai]

Re: Panasonic TC-P55ST30 one led blink

opps double post by accident

[tw2005]

Re: Panasonic TC-P55ST30 one led blink

got a new A board plugged it in, now 7 blinks points to the SU SD board

did the jumper test, powered on, no blinks so that clears the SC board

i cant seem to find a way diagnosis just the su or just sd board any tips?

and are the SD/SU boards interchangeable between models or different versions of the same tv i need TNPA5340 but found TNPA5340AK they have different pany part numbers

and a final thought the A board i got is damaged (see pics) you think it will be okay or should i have the seller replace/return it (and im pretty sure i need an A board i put the old one back in and tried the jumper trick from earlier and still only 1 blink )

Try slide 71 on since you've already got a clear startup with the SC50 jump.

You're certainly going to have to grab the HDMI body well if you attempt to straighten that tab. Could always try a partial refund? A boards can be hard to find so you probably don't have a lot of leverage.

[smai]

Re: Panasonic TC-P55ST30 one led blink

Try slide 71 on since you've already got a clear startup with the SC50 jump.

You're certainly going to have to grab the HDMI body well if you attempt to straighten that tab. Could always try a partial refund? A boards can be hard to find so you probably don't have a lot of leverage.

sweet thanks, i dont have this service manual

im more worried about the other photo with the chip knocked off the part

[tw2005]

Re: Panasonic TC-P55ST30 one led blink

Oh, ok did not check that one. Doubt that will be a major issue. It's just an inductor, probably not too hard to track one down. I'd have a go at getting a price reduction though. If using Paypal, you have evidence of it not as described.

How rare are the boards though?

[smai]

Re: Panasonic TC-P55ST30 one led blink

this one with the suffix AD wasnt the easiest to find but i think he has another and i have seen a few others on the bay site ill see if he want to toss some money back my way

so once i started testing the boards trying to narrow down which baord needed to be replaced, the TV just started working im guessing a reseat of the ribbon did it

but now i am getting a buzzing from the SS but ONLY when there is video or something being displayed if the screen is BLACK i dont hear it or its very low, there might alos be buzzing coming from the power board and on the SS, the heat sink that has a few regulators bolted to it is HOT i can feel it radiating im guessing that is somewhat normal, but how to i proceed on stopping the buzzing ?

i can take a video if need be

[tw2005]

Re: Panasonic TC-P55ST30 one led blink

make sure the bolts are secure, otherwise can't say i've struck a Pana with buzzing boards except when I had a loose SC.

[smai]

Re: Panasonic TC-P55ST30 one led blink

they offered 15 dollars back and 90 day warranty or just a 6 month warranty what do you think ?

[tw2005]

Re: Panasonic TC-P55ST30 one led blink

they offered 15 dollars back and 90 day warranty or just a 6 month warranty what do you think ?

Comes down to whether $15 is life changing or the wty, provided they're still around and keep their word.

As a percentage of the original purchase ?

Bottom line is you need one, not much difference between 3 & 6 months, you'd be unlucky if this went again.

Can go into the service mode and see how many hours it's clocked up.