panasonic viera 42" rolling lines down screen

[Bikemech]

hi all, just bought a 42" panasonic viera tv for £20.00 as it has lines rollin down the screen from top to bottom?

anyone have any ideas how to fix this as it would be a nice set in good working order,

i have the service manuel,

dont currently have the remote control,

i have checked for bad capasitors but cant see anything obvious,






the service manuel is available here, but you have to wait 30 seconds or so for the link to be active, its just underneath the image on the left, it will say processing untill its ready for download






thanks in advance to anyone who can help

[nomoresonys]

Re: panasonic viera 42" rolling lines down screen

may have a bad y-sustain board or some part on it or bad connection.

[nomoresonys]

Re: panasonic viera 42" rolling lines down screen

one of the hard parts is understanding schematics, learning the symbols n such, but can be done with research and perseverance.

[Bikemech]

Re: panasonic viera 42" rolling lines down screen

Could you tell me which one would be the Y sustain board?

[Bikemech]

Re: panasonic viera 42" rolling lines down screen

Just so I have some idea of where to start looking, cheers

[Bikemech]

Re: panasonic viera 42" rolling lines down screen





This one???

[nomoresonys]

Re: panasonic viera 42" rolling lines down screen

Just so I have some idea of where to start looking, cheers

y-sus is the board just left of the power supply board, power supply board is the middle board.

[nomoresonys]

Re: panasonic viera 42" rolling lines down screen

[QUOTE=Bikemech;515669]



This one???[/QUOTE yes.

[nomoresonys]

Re: panasonic viera 42" rolling lines down screen

be careful working with power supply, HIGH VOLTAGE, can be deadly.

[nomoresonys]

Re: panasonic viera 42" rolling lines down screen

I havent worked with too many plasmas but some of the other guys are very knowledgeable with them.

[Bikemech]

Re: panasonic viera 42" rolling lines down screen

hopefully someone can give me some direction as to where to start testing on the y sus board, or is it best to start testing psu?,
all looks good on the psu, no swolan or leaking caps

[sordids999]

Re: panasonic viera 42" rolling lines down screen

wait for tw2005 or tom66 they know more about plasma`s

[mmartell]

Re: panasonic viera 42" rolling lines down screen

I don't know what the nature of the fault is but wouldn't hurt while your waiting for the cavalry to run the auto-gen to rule out your digital board. It's usually located beneath your main board, I can't tell from your pics though.

[Bikemech]

Re: panasonic viera 42" rolling lines down screen

am i being dimm?
will they just post or should i contact them,
thanks for your help tho.

[sordids999]

Re: panasonic viera 42" rolling lines down screen

They will reply eventually

[tom66]

Re: panasonic viera 42" rolling lines down screen

When I post depends entirely on when I have the time...... Tw will probably chip in later with additional info... I reckon this is an A board fault, you should access the service menu and use the test patterns feature.

Not sure what it is for this 2010 model but 2008 is this:

Hold VOL- on TV and press 0 on remote three times.
Wait for menu to appear (takes a few seconds)
Press "red" on remote a few times to select different patterns, note which, if any, are affected.

[Bikemech]

Re: panasonic viera 42" rolling lines down screen

Thank you for your reply, I need to get a remote control to access this menus, will do that and get back with my results, thanks again

[Neelix]

Re: panasonic viera 42" rolling lines down screen

That looks like the same fault I had long time ago on a different model. If I can remember right, then it was one of the BGAs on the A board that needed to be replaced. That service manual on elektrotanya does not look right and won't be of much use. Do your TV have monitor out? If your TV have monitor out, then connect a DVD player or something like that to one of the inputs(but not HDMI because monitor out is blanked out then) and connect the monitor out to the input of another TV to see if the lines show in the monitor out picture also. I take it the TV also don't show any OSD and so you must keep one pressing the input source button until you're on the right input and see the monitor out picture

[tw2005]

Re: panasonic viera 42" rolling lines down screen

When I post depends entirely on when I have the time...... Tw will probably chip in later with additional info... I reckon this is an A board fault, you should access the service menu and use the test patterns feature.

Not sure what it is for this 2010 model but 2008 is this:

Hold VOL- on TV and press 0 on remote three times.
Wait for menu to appear (takes a few seconds)
Press "red" on remote a few times to select different patterns, note which, if any, are affected.

That looks like the same fault I had long time ago on a different model. If I can remember right, then it was one of the BGAs on the A board that needed to be replaced. That service manual on elektrotanya does not look right and won't be of much use. Do your TV have monitor out? If your TV have monitor out, then connect a DVD player or something like that to one of the inputs(but not HDMI because monitor out is blanked out then) and connect the monitor out to the input of another TV to see if the lines show in the monitor out picture also. I take it the TV also don't show any OSD and so you must keep one pressing the input source button until you're on the right input and see the monitor out picture

Nothing I can add, 100% A board issue in my opinion

As Tom has pointed out for the service mode.

6.1. How to enter into Service Mode
While pressing [VOLUME ( - )] button of the main unit, press [0] button of the remote control three times within 2 seconds.

6.1.1. Key command
[1] button...Main items Selection in forward direction
[2] button...Main items Selection in reverse direction
[3] button...Sub items Selection in forward direction
[4] button...Sub items Selection in reverse direction
[RED] button...All Sub items Selection in forward direction
[GREEN] button...All Sub items Selection in reverse direction
[VOL] button...Value of sub items change in forward direction ( + ), in reverse direction ( - )

[freakaftr8]

Re: panasonic viera 42" rolling lines down screen

Indeed. A board issue. Could be cold solder connections on BGA chip. Try some heat on the a board. this is the boy that has a connections that plug into it from the HDMI and component and the tuner