47 in lcd menus don't look right

[efwiofoi]

i have a 47inch baird lcd with a cv109h mainboard and a lg philips LC470WUN panel.

i've replaced 5 bulging caps in the psu to get the set working. but the menu looks blurred, it's like every other row of pixels is swapped round.
i think the tv has this effect also but its hard to see.

i've accessed the service menu, but nothing seems to correct this.

in the service menu there is ssc adjust, ssc mu on/off, ssc lvds on/off, lcds span (350), lvds step (200). none of these setting seem to make any difference.

could it be a faulty t con?



thanks

[tom66]

Re: 47 in lcd menus don't look right

The image looks to have this effect too. I would be surprised if the t-con caused this, but a loose LVDS cable could cause this problem. Also check LVDS mode in service menu, etc. If all else fails, the flash chip (incorrectly called EEPROM) could be the cause of this.

[efwiofoi]

Re: 47 in lcd menus don't look right

ive had the t con out and i think its the wrong one for the panel.
the panel is actually a LC470WUE, (LC470WUN was also fitted to this model)
the tcon has been changed, as it has a handwritten sticker on with the tv model no.
but the tcon says LC470WUN.

i've found a new one on ebay, which is for an LC470WUE

however it says LC470WUE (SD)(P1)

my panel is LC470WUE (SB) (B1)

close enough?

[efwiofoi]

Re: 47 in lcd menus don't look right

[tom66]

Re: 47 in lcd menus don't look right

Are the T-con boards substantially different?

[newtothis]

Re: 47 in lcd menus don't look right

No real difference in these T-cons

[efwiofoi]

Re: 47 in lcd menus don't look right

i don't know, it seemed like it might be the cause, but i found one on ebay listed as suitable for both panels (from an experienced seller who i think must know), so it comes back to some other problem or a possible faulty tcon. the main board is the right one for the panel as it has the matching sticker on it. the cable looks ok. there's nothing else i can change in the menu. possible faulty flash chip on the main board? is that the big square one with the heat sink on it?

[newtothis]

Re: 47 in lcd menus don't look right

Confirmed that the 2 t-cons will make no difference, I have a WUN panel here fitted with a WUE T-con

[tom66]

Re: 47 in lcd menus don't look right

Could also be bad RAM - a missing bit in the address for it would cause this (odd/even interlacing in video.) Though normally would not line up so well... If so a reflow would be a temporary cure (a reball is really the only permanent fix, most reflows do not last a month.)

Strange one, I think I have seen it before on a laptop, but I think that was just bad LVDS.

If you have a digital scope or a storage scope you could try sending patterns to the LCD which have slight differences to see what difference it might make in the LVDS signal coming out.

[flocko]

Re: 47 in lcd menus don't look right

Hi with all Lg T-cons the silk screen board number just give you type not part number, on the board in the photo the part number is the one in red and reads 2803A, you need to check the part number for your set, look it up on shopjimmy