75ZT Community

Panasonic Viera 42 inch LCD, won't switch on ..
4 blinks of the power light relates to a power supply problem.
Its a TX-L-42S 10b , far too nice to just chuck away ..

Whipped PSU board out , and can't see anything burnt or bulgy Capactitorish .
tested a few components and they seem ok ..

Even found a Service manual but although I can read and partially understand some, its outside my brief to diagnose ,
But capable of testing under instructions from some more experienced person !

Chris

I used to fix them many years ago, while they still had tubes though.

Only flatscreen I ever fixed was a simple bad soldered joint in the power supply. So I can only suggest a magnifying glass as they still happen.

Might give you a pointer or two...

http://www.fixya.com/support/t13851008- ... ed_flashes

http://www.justanswer.com/tv-repair/5k3 ... t-nig.html

Was actually given this as dead TV .
Well Sussed that 4 blinks is a PSU prob..
managed to sort of isolate the Prob down to a controller IC 18 pin ( I think ), Found it seems only available from China.. About £5 for 2 ,, but quoted £20-30 for postage .. ????, tried to wangle a sample but still want lotsa postage.? worst bit was up to 40 days delivery ?? why ?

Well Found another whole PSU board on the net for £40.. fitted, an its all perfect .

Now its working .. SWMBO has decided its too big for the Room, I agree a bit !! but its ace for movies..

So its on Gumtree, and few other free sites .. Not Giving Fleabay 20% ..

We will see what happens..

So back to the Hannspree 27 incher.. a super lil TV with excellent sound. but a tad small after this monster, til I find a 37-40 suitable .( IE one with decent sound)

My dad was a self taught tv engineer many years ago and I picked up a few tips from him. A couple of light taps on the side with an open palm usually did the trick but failing this one large thump with a clenched fist on the top either killed or cured...........sorry, it just brought back memories!

zojosc wrote:My dad was a self taught tv engineer many years ago and I picked up a few tips from him. A couple of light taps on the side with an open palm usually did the trick but failing this one large thump with a clenched fist on the top either killed or cured...........sorry, it just brought back memories!

Years back we had a old Philips TV Wooden case type , every few months it would go green, turn it on its side give a good boot and all well again for months.

Around that time my no 1 son had a prob with his Amstrad tv ( and being teenager thought "it works for dad!! ?) ..

Put his foot right through the case and the main board.
it punched the main transformer right off the PCB (Printed Circuit Board) .
So Muggins spent a few hours sticking it back in with a spiders web of copper wires ,
and it actually worked ..

C.

zojosc wrote:My dad was a self taught tv engineer many years ago and I picked up a few tips from him. A couple of light taps on the side with an open palm usually did the trick but failing this one large thump with a clenched fist on the top either killed or cured...........sorry, it just brought back memories!

Still works as well today as it ever did. Repaired a cordless phone this afternoon with a good smack.

I did once have a bigger repair job when someone had found tapping a radio fixed it for a while. They only asked me to look at it when hitting it with a rock had stopped working anymore.!

By the way, the technique is technically known as percussive maintenance.

Hi Ceedy did you sell this in the end Panasonic Viera 42 inch LCD

Yup, it went yesterday ... had so many calls , should have asked a bit more for it !!

Bloke came from Cardiff to get it , now I've got to buy a another as typically now its gone , Swmbo ( who started the "its too big for this room ", is wingeing cos the current one is now too small!! Arrgh!!

Suppose now i can get a 40 incher .. and pay more for it!!
its another minefield for a buyer , with my old ears I need one with decent sort of Audio ,
most of them are awful

Even this viera was only just about ok .

C.