Master thread for Panasonic plasma not turning on - Page 76 - AVS | Home Theater Discussions And Reviews
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post #2251 of 2256 Unread 04-26-2015, 05:34 PM
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Ok so I've had my panasonic p46st30 for a while now--number of years maybe 3-4)--and it was working fine up till now. I've been combing and reading through the thread but apparently not many people had the same problem as mine and the ones that did their questions never got responded so I was wondering if anybody would be kind of enough to help me?

My tv now won't turn on at all--the display when turned on makes the usual 1 click noise when you first turn it on and then displays a black screen and stays there--with the red LED on the front bottom screen displaying power staying at a constant rate with no blinking. Whereas after this happens the remote doesn't work or respond to the tv, and also the buttons on the tv do not work at all--all buttons including the menu--yet the power on the tv is on. So I'm not sure if this is the A board or not?

Would somebody be kind enough to help me with this?

Thanks.
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post #2252 of 2256 Unread 04-27-2015, 01:17 AM
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Quote:
Originally Posted by Swuell View Post
Ok so I've had my panasonic p46st30 for a while now--number of years maybe 3-4)--and it was working fine up till now. I've been combing and reading through the thread but apparently not many people had the same problem as mine and the ones that did their questions never got responded so I was wondering if anybody would be kind of enough to help me?

My tv now won't turn on at all--the display when turned on makes the usual 1 click noise when you first turn it on and then displays a black screen and stays there--with the red LED on the front bottom screen displaying power staying at a constant rate with no blinking. Whereas after this happens the remote doesn't work or respond to the tv, and also the buttons on the tv do not work at all--all buttons including the menu--yet the power on the tv is on. So I'm not sure if this is the A board or not?

Would somebody be kind enough to help me with this?

Thanks.
Sounds like it could be in locked mode, shorted Sc board would be high on the suspect list which can produce locked solid LED, no codes.

"Shutdown but No Blink code - Power LED stays on (Check for Shorted Vsus* / Vda** / P15V)."

"Red Solid LED (No Blink): LSI error. This condition is triggered when the power supply SOS-detect-signal is triggered during the startup process."


"These conditions can cause the TV to shutdown while the power LED stays on (Solid red)
New
1.
Over current condition detected by the power supply during start-up process.
􀂉
Shorted Vsus.
􀂉
Shorted Vda.
􀂉
Shorted P15V.
2.
Wrong diagnostic by the A board"


Also recommended to replace the SC mounting bolts with preferred bolts with flat washers and spring washers like they use to be as these new ones are not suited and work loose, create poor earths and arcing. you may find some loose on this board an the SS board on the other side.

you may find some more info on Badcaps.net Affects this whole series (2011) Sc board short is very common

ModuslinkPTS do rebuilds and Sd/SU boards need to be checked for shorts as well.
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post #2253 of 2256 Unread Yesterday, 01:33 AM
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TX-P42S30B - 6 blinks

Hi,

I have a TX-P42S30B with 6 blinks.

I've found the ShopJimmy YouTube video for diagnosing the offending board BUT it's naturally for the US model.

My question is: do you think I can follow the diagnostic advice for my UK model?
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post #2254 of 2256 Unread Yesterday, 08:04 AM
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Originally Posted by MikeFloutier View Post
Hi,

I have a TX-P42S30B with 6 blinks.

I've found the ShopJimmy YouTube video for diagnosing the offending board BUT it's naturally for the US model.

My question is: do you think I can follow the diagnostic advice for my UK model?
yes, 6 blinks i'd be thinking SN board
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post #2255 of 2256 Unread Today, 12:50 PM
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Hi guys.

I have the 7 blinks problem on my ST30, i suspect it can be a problem with the A board because when the error happened the hdmi cable was folded on the conector. I think it might short the A board.

How can I check the A board? SAT ask me 300$ for that...
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post #2256 of 2256 Unread Today, 06:48 PM
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Quote:
Originally Posted by websmr View Post
Hi guys.

I have the 7 blinks problem on my ST30, i suspect it can be a problem with the A board because when the error happened the hdmi cable was folded on the conector. I think it might short the A board.

How can I check the A board? SAT ask me 300$ for that...
The service manual tells you how to test each board for specific problems. If you're good with a multimeter, it's probably not too hard to check. Was there any prior indication that something was wrong (loud buzzing, pink/purple IR and ghosting)? The SC, SD, SS, and SU board are a common problem on the 30 series and 7 blinks can indicate problems with them.
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