Polaroid TLA-04011c Red Light on, no power on

[SlickClick]

Re: Polaroid TLA-04011c Red Light on, no power on

The text file you attached has no useful information in it...

[ryn0909]

Re: Polaroid TLA-04011c Red Light on, no power on

yea its relevance was to support the reason why there was a jumper soldered to the backside........ just incase you happen to buy a board and it has that on there, then you'll know why

[SlickClick]

Re: Polaroid TLA-04011c Red Light on, no power on

Im trying to avoid buying a board in hope to simply repair my current one...

[ryn0909]

Re: Polaroid TLA-04011c Red Light on, no power on

yea i hear ya there.... we're in the same boat. Ya know i got to thinking about the chain of events leading up till now with my tv, and somethings weird. This is why......
Initially the tv was working fine, i hooked it up to a desktop pc to use as a monitor and all was well. I rebooted the pc, tv screen went black and never came back on. I would get the red standby light come on when i plugged in the power cord, but that was all. No blue light or backlights would come on.
So i bought the FIRST mainboard (used) installed it and the tv would power on, blue light on, backlights on, and i would get a BLUE Screen but no polaroid logo or anything else. i sent that board back and bought the SECOND mainboard (used), which is the one i currently have. Now this is where things change, i get the tv to power on, blue light on, backlights on, but no blue screen, its black. now thats where its throwing me off, because im starting to think it might be something other than the mainboard..........

[SlickClick]

Re: Polaroid TLA-04011c Red Light on, no power on

Well first thing is do you still have your original MB..? did you test your power supply..?

Its not weird as to how it happened... my buddy who gae me the TV said he was watching it... turned it off one night and the next day nada...

[ryn0909]

Re: Polaroid TLA-04011c Red Light on, no power on

yea i still have the original main board, and i have not done any tests on the power supply.... the fact that it quit working isnt what i find weird, its the difference between the FIRST and SECOND boards that i purchased..... one gives me a black screen the other gave me a blue screen...

[ryn0909]

Re: Polaroid TLA-04011c Red Light on, no power on

hey slick, have you had any luck yet?? the guy who sold me the board, has apparently fallen ill and so im waiting for him to get better.....

[ryn0909]

Re: Polaroid TLA-04011c Red Light on, no power on

Well first thing is do you still have your original MB..? did you test your power supply..?

Its not weird as to how it happened... my buddy who gae me the TV said he was watching it... turned it off one night and the next day nada...

Nice...... no final solutions here so you just bail out huh? so much for teamwork.

[ryn0909]

Re: Polaroid TLA-04011c Red Light on, no power on

Hey PlainBill, i have a question that may help shed new light on my issue here. So i bought the FIRST mainboard (used) installed it and the tv would power on, blue light on, backlights on, and i would get a BLUE Screen but no polaroid logo or anything else. i sent that board back and bought the SECOND mainboard (used), which is the one i currently have. Now this is where things change, i get the tv to power on, blue light on, backlights on, but no blue screen, its black. what does that sound like to you???

[tom66]

Re: Polaroid TLA-04011c Red Light on, no power on

Hey PlainBill, i have a question that may help shed new light on my issue here. So i bought the FIRST mainboard (used) installed it and the tv would power on, blue light on, backlights on, and i would get a BLUE Screen but no polaroid logo or anything else. i sent that board back and bought the SECOND mainboard (used), which is the one i currently have. Now this is where things change, i get the tv to power on, blue light on, backlights on, but no blue screen, its black. what does that sound like to you???

A black screen seems to indicate that the LCD is blocking light - if you disconnect the LVDS does the screen (slowly) go white?

[PlainBill]

Re: Polaroid TLA-04011c Red Light on, no power on

Hey PlainBill, i have a question that may help shed new light on my issue here. So i bought the FIRST mainboard (used) installed it and the tv would power on, blue light on, backlights on, and i would get a BLUE Screen but no polaroid logo or anything else. i sent that board back and bought the SECOND mainboard (used), which is the one i currently have. Now this is where things change, i get the tv to power on, blue light on, backlights on, but no blue screen, its black. what does that sound like to you???

It sounds like you have boards with two different problems. A blue screen USUALLY indicates the video processor is signalling a 'No Signal' condition. A black screen could be no signal out of the video processor

PlainBill

[ryn0909]

Re: Polaroid TLA-04011c Red Light on, no power on

well i guess it doesnt surprise me that both boards would have separate issues. the seller of the second board was helping me to try and figure out what was going on. but ever since i brought this same question to his attention, he hasnt responded. so im becoming more convinced that this second board has an issue as well. On a side note, i did figure out a way to take "good quality & close-range" pics with my camera phone. I utilized one of the lens's from an old cdrom drive and attached it to my camera phone, with scotch tape.... i attached a sample pic

[ryn0909]

Re: Polaroid TLA-04011c Red Light on, no power on

A black screen seems to indicate that the LCD is blocking light - if you disconnect the LVDS does the screen (slowly) go white?

i unplugged the lvds cable and there was no change..... so would it be either the lvds cable or tcon board??

[PlainBill]

Re: Polaroid TLA-04011c Red Light on, no power on

well i guess it doesnt surprise me that both boards would have separate issues. the seller of the second board was helping me to try and figure out what was going on. but ever since i brought this same question to his attention, he hasnt responded. so im becoming more convinced that this second board has an issue as well. On a side note, i did figure out a way to take "good quality & close-range" pics with my camera phone. I utilized one of the lens's from an old cdrom drive and attached it to my camera phone, with scotch tape.... i attached a sample pic

Son of a gun!!! That is an excellent picture. Well, the field of view leaves a little to be desired, but it is easy to identify the IC.

PlainBill

[ryn0909]

Re: Polaroid TLA-04011c Red Light on, no power on

hehehe well thank you, im glad i was able to produce a good quality pic. yea the field of view is what im trying to fix without degrading the quality..... lol ill get it figured out


this is the widest view i could achieve with what i had to work with....

[tom66]

Re: Polaroid TLA-04011c Red Light on, no power on

i unplugged the lvds cable and there was no change..... so would it be either the lvds cable or tcon board??

Sounds a lot like the backlight then.

[ryn0909]

Re: Polaroid TLA-04011c Red Light on, no power on

Sounds a lot like the backlight then.

but the backlights are on.....

[tom66]

Re: Polaroid TLA-04011c Red Light on, no power on

but the backlights are on.....

Well, that is unexpected... maybe the LCD is a normally black display but I thought most were normally white.

[ryn0909]

Re: Polaroid TLA-04011c Red Light on, no power on

so what problem does that indicate?

[tom66]

Re: Polaroid TLA-04011c Red Light on, no power on

so what problem does that indicate?

Main board or TCON. Unlikely to be PSU, but it could be...

This is why I hate repairing cheap electronics, there is rarely a simple answer to a problem.

I haven't read through the thread thoroughly, can you give me a run down of problems you have and tests you have done?