Panasonic TH-42PX25

[KJINTF]

Hi all,

New to this forum and looking forward to becoming a contributing member

My Panasonic Plasma symptoms include
1- "Auto Scan" function goes through it entire routine with no results
Did this test several times Antenna A input was supplied with local DTV antenna (other TV's find 16 to 20 channels) The a strong analog Channel #3 found nothing, tried antenna B input same results
2 - No analog or digital OTA reception However
that said in the PIP mode with an analog channel #3 RF source connected to Antenna "A" a picture appears in the pip without any audio (manually added channel #3)
3- All analog (composite and component) and HDMI inputs function properly

Self check - showed all items "OK" no errors

About menu displays
2045004056
8003037017
9401013017

Did the "Hold down OK and Power" master reset - no difference

2005 model year - To date never has had any service
Thanks have downloaded the Panasonic Service and training manuals

Possible firmware issue?
Any and all suggestions sure would be appreciated
Thanks for the help
Ken

[tom66]

Re: Panasonic TH-42PX25

So, the jist is, no signals from the analogue or digital receiver?

I would say you can buy a cheap digital receiver nowadays... but if you want to fix your TV, the best bet might be to look at the main board. Often there is a 33V rail which is used to "bias" the tuner into operating properly; if this goes bad (too low, lower than about 30V) the tuner won't be able to recieve any channels. Before the fault occurred, did you notice it having difficulty with some channels, maybe they were weaker or did not tune, but others worked?

[KJINTF]

Re: Panasonic TH-42PX25

Tom
Thanks for the quick response - I will check the voltage rail
The TV is hanging high on the wall and is HEAVY - O well todays project

Not exactly no signals - since in the PIP mode with the antenna input as a source displays a good looking picture but without any audio.

I do want to try and keep the set fully operational - the external receiver could be a fall back if all else fails.

Wish I had more info on how and when the tuners started to have their problems. Just last week I tried the DTV tuner for the first time ever. Had been using the analog on on and off but had not looked at it for many months. Found the problem last week when I installed a nice DTV external antenna to get proper HD reception rather than the compressed to death Dish Network for my local channels. The other TV's connected the the distribution system get 16 DTV channels their DTV signal strength meters show excellent signal strength.

[truep]

Re: Panasonic TH-42PX25

Just a thought, Are you sure the tv is set for antenna and not cable? Some do it automatically and some have a separate setting for cable and antenna.

[KJINTF]

Re: Panasonic TH-42PX25

Yes - thanks for the suggestion
There are several choices for both antenna A and antenna B went through them all
Left it on Antenna Only / Antenna A / analog and digital reception
Same result as above