"no signal" problem on my panasonic plasma

readymademack · 03-13-2009, 05:40 AM

I have a 42 inch panasonic plasma TH-42PX80B, its nearly 10 months old now and its nearly out of warrenty so i need to fix this problem i'm having.
every now and then when i turn my tv on it will say no signal on dtv, when i rescan the channels it wont find anything and switch to analog. i can keep rescanning but nothing comes up. i usually unplug everything and cut power completely and leave it for ten to fifteen minutes and try it all again, sometimes it works and my tv will find all the dvb services but sometimes it takes hours to get working again. i have tried another tv (37 inch lcd) on my coaxle when the problem happens and that will work fine so i know its not the signal.
I have spoken to panasonic many times about this problem because it started happening 6 months after i purchased the tv and they have had engineers pick up my tv twice to try and fix it but both returned the tv after 2 weeks saying they had no problems.
i really dont understand whats going on with it as when it works it can be fine for weeks but every now and then ( and its happening more often) i will turn the tv on to find no signal and have to mess about unplugging and hoping it comes back on.

i'm hoping somebody might know whats happening so please all feedback is appreciated

DonaldG · 03-13-2009, 06:03 AM

Hi & welcome to TSF

I Presume that you have had the Aerial and coax feeder checked and found to be OK (I would think it is if you are getting a good solid analogue signal.)

It would appear that there is an intermittent fault in the TV - the hardest type of fault to track down!

However it is still under warranty therefore it is not recommended that try & fix it yourself.

Pursue the fault procedures with the place where you bought it from. Keep a detailed and clear record of all the faults.

Keep a history log of when it was returned for repair, how long it was away etc. This is the evidence of it's unreliability.

If you have enough proof of it being faulty from early days, *try* demanding a replacement TV because you have lost faith in it's reliability.

The fact that the 'engineers' have not found a fault/problem does not mean that there isn't one.

readymademack · 03-13-2009, 06:58 AM

hi, thanks for the fast reply, to be honest i'm kinda tired of all the messing about now and was thinking of buying a freesat box instead of using the built in digital reciever, if the problem with my tv is the freeview side of things then this would be ok i assume?.

also to fuel my anger today i have noticed a pixel flickering, i know the tv was a low price unit but i didnt think i would have so many isues, and after such a short period.

exactly how many dead pixels do i need before panasonic will replace my tv?

DonaldG · 03-13-2009, 02:21 PM

I am not sure on how many dead pixels must be accepted on a TV - That is something that you will have to check.

Whatever, I wish you well with getting it all sorted out.

Regards

RickRedSox · 03-25-2009, 05:39 PM

Hi, I have 46in Panasonic TH-46PZ85B 11 months old with exactly same problem. I have already had it repaired once even though the service centre claimed no fault found they replaced the tuner board. It's still doing the same thing - intermittently giving "no signal" message even though I know the signal is good. Takes hours to be left alone and then works fine. I was going to give up and use a freeview box but now I know its not just mine I will go back to Pana service again. I noticed that when the "no signal" fault occurs, the signal condition monitor on the setup menu shows 50% signal strength but 0% signal quality. Does yours do the same ?

03-13-2009, 05:40 AM	#1 (permalink)
readymademack Registered User Join Date: Mar 2009 Posts: 2 OS: vista 64x ultimate	"no signal" problem on my panasonic plasma I have a 42 inch panasonic plasma TH-42PX80B, its nearly 10 months old now and its nearly out of warrenty so i need to fix this problem i'm having. every now and then when i turn my tv on it will say no signal on dtv, when i rescan the channels it wont find anything and switch to analog. i can keep rescanning but nothing comes up. i usually unplug everything and cut power completely and leave it for ten to fifteen minutes and try it all again, sometimes it works and my tv will find all the dvb services but sometimes it takes hours to get working again. i have tried another tv (37 inch lcd) on my coaxle when the problem happens and that will work fine so i know its not the signal. I have spoken to panasonic many times about this problem because it started happening 6 months after i purchased the tv and they have had engineers pick up my tv twice to try and fix it but both returned the tv after 2 weeks saying they had no problems. i really dont understand whats going on with it as when it works it can be fine for weeks but every now and then ( and its happening more often) i will turn the tv on to find no signal and have to mess about unplugging and hoping it comes back on. i'm hoping somebody might know whats happening so please all feedback is appreciated

03-13-2009, 06:03 AM	#2 (permalink)
DonaldG Asst Manager Articles Team Join Date: Aug 2007 Location: Somerset, UK Posts: 10,018 OS: XPsp2 Laptop & Vista Ultimate Desktop My System Blog Entries: 1	Re: "no signal" problem on my panasonic plasma Hi & welcome to TSF I Presume that you have had the Aerial and coax feeder checked and found to be OK (I would think it is if you are getting a good solid analogue signal.) It would appear that there is an intermittent fault in the TV - the hardest type of fault to track down! However it is still under warranty therefore it is not recommended that try & fix it yourself. Pursue the fault procedures with the place where you bought it from. Keep a detailed and clear record of all the faults. Keep a history log of when it was returned for repair, how long it was away etc. This is the evidence of it's unreliability. If you have enough proof of it being faulty from early days, try demanding a replacement TV because you have lost faith in it's reliability. The fact that the 'engineers' have not found a fault/problem does not mean that there isn't one. __________________ . Lest we forget... "They shall grow not old, as we that are left grow old; Age shall not weary them, nor the years condemn. At the going down of the sun and in the morning We will remember them." Submit New Articles Here TSF's Photographer's Corner .

03-13-2009, 06:58 AM	#3 (permalink)
readymademack Registered User Join Date: Mar 2009 Posts: 2 OS: vista 64x ultimate	Re: "no signal" problem on my panasonic plasma hi, thanks for the fast reply, to be honest i'm kinda tired of all the messing about now and was thinking of buying a freesat box instead of using the built in digital reciever, if the problem with my tv is the freeview side of things then this would be ok i assume?. also to fuel my anger today i have noticed a pixel flickering, i know the tv was a low price unit but i didnt think i would have so many isues, and after such a short period. exactly how many dead pixels do i need before panasonic will replace my tv?

03-13-2009, 02:21 PM	#4 (permalink)
DonaldG Asst Manager Articles Team Join Date: Aug 2007 Location: Somerset, UK Posts: 10,018 OS: XPsp2 Laptop & Vista Ultimate Desktop My System Blog Entries: 1	Re: "no signal" problem on my panasonic plasma I am not sure on how many dead pixels must be accepted on a TV - That is something that you will have to check. Whatever, I wish you well with getting it all sorted out. Regards __________________ . Lest we forget... "They shall grow not old, as we that are left grow old; Age shall not weary them, nor the years condemn. At the going down of the sun and in the morning We will remember them." Submit New Articles Here TSF's Photographer's Corner .

03-25-2009, 05:39 PM	#5 (permalink)
RickRedSox Registered User Join Date: Mar 2009 Posts: 1 OS: Vista SP1	Re: "no signal" problem on my panasonic plasma Hi, I have 46in Panasonic TH-46PZ85B 11 months old with exactly same problem. I have already had it repaired once even though the service centre claimed no fault found they replaced the tuner board. It's still doing the same thing - intermittently giving "no signal" message even though I know the signal is good. Takes hours to be left alone and then works fine. I was going to give up and use a freeview box but now I know its not just mine I will go back to Pana service again. I noticed that when the "no signal" fault occurs, the signal condition monitor on the setup menu shows 50% signal strength but 0% signal quality. Does yours do the same ?