LG 42PJ550 Click

[anotherdude]

Re: LG 42PJ550 Click

That looks fine to me.
Have you jumpered the power supply ON and tried test patterns yet?

215V~220V - what cap? The 450V ones? You need to measure across them.

ye have already got the test patterns, so power supply is good i presume, was getting the mainboard voltages from the off but not the vs va etc

the cap i photo'd has like scratching down it what look more like cracking

the top also feels different to the rest not bulged but as though something is coming through

[tom66]

Re: LG 42PJ550 Click

If you got test patterns the main board is the cause of the fault. Check voltage regulators & DC-DC converters but you will likely have another corrupt FLASH problem which will require a new board.

[anotherdude]

Re: LG 42PJ550 Click

If you got test patterns the main board is the cause of the fault. Check voltage regulators & DC-DC converters but you will likely have another corrupt FLASH problem which will require a new board.

ok tom, the mainboard will it matter if it's came from a different model (bigger screen)

this one for example http://www.ebay.co.uk/itm/251488807165

[anotherdude]

Re: LG 42PJ550 Click

anyone able to advise on the above?

[anotherdude]

Re: LG 42PJ550 Click

If you got test patterns the main board is the cause of the fault. Check voltage regulators & DC-DC converters but you will likely have another corrupt FLASH problem which will require a new board.

tom, I seen a post you'd commented on on another forum (avs) about a model previous to this (3 series i think) towards the end of the thread I seen a post about teraterm and possibly unbricking (as the symptomns sound like a corrupt flash as you say)

I've just got the latest firmware off LG site and wondered if this would work at all for this model?

[tw2005]

Re: LG 42PJ550 Click

anyone able to advise on the above?

I'd expect the TV to operate but the firmware would be configured different for each size. The part number of yours is different to this one?

I have put a 50 in a 42 for a panasonic, it worked but I can't remember if the display was incorrect.

I swapped all the eeproms over from the dead 42 board to the 50 and that coverted to the 42.

I know very little about LG stuff.

[anotherdude]

Re: LG 42PJ550 Click

I'd expect the TV to operate but the firmware would be configured different for each size. The part number of yours is different to this one?

I have put a 50 in a 42 for a panasonic, it worked but I can't remember if the display was incorrect.

I swapped all the eeproms over from the dead 42 board to the 50 and that coverted to the 42.

I know very little about LG stuff.

just the screen size is different from what I can tell, the board being for a 50pj550, the board numbers match but it's listed as being for the 50 inch model

if the tv did work with it could I update the tv via usb back to the 42 settings with a usb update from the LG site?

[tw2005]

Re: LG 42PJ550 Click

just the screen size is different from what I can tell, the board being for a 50pj550, the board numbers match but it's listed as being for the 50 inch model

if the tv did work with it could I update the tv via usb back to the 42 settings with a usb update from the LG site?

Out of my league, I doubt it. have you purchased that board on ebay yet?

[anotherdude]

Re: LG 42PJ550 Click

Out of my league, I doubt it. have you purchased that board on ebay yet?

I did, got it for £20, worst comes to worst and it doesn't work I could try the tera term thing i've read about and see if the originals recoverable

[tw2005]

Re: LG 42PJ550 Click

I did, got it for £20, worst comes to worst and it doesn't work I could try the tera term thing i've read about and see if the originals recoverable

Cool, I don't have to break the news it's sold then

would it be worthwhile fault finding the dead board in case it was something simple not that I have any experience with these.

There is an excellent training guide but the mainboard in that is for a different region but maybe enough info to correlate to yours for fault finding?

have you got the guide?

[anotherdude]

Re: LG 42PJ550 Click

Cool, I don't have to break the news it's sold then

would it be worthwhile fault finding the dead board in case it was something simple not that I have any experience with these.

There is an excellent training guide but the mainboard in that is for a different region but maybe enough info to correlate to yours for fault finding?

have you got the guide?

from reading posts on lg-hack, avs and tom here i'm pretty sure it's a corrupt firmware as the symptomns match, but no i haven't found a service guide

[tw2005]

Re: LG 42PJ550 Click

from reading posts on lg-hack, avs and tom here i'm pretty sure it's a corrupt firmware as the symptomns match, but no i haven't found a service guide

Ok, that's cool if it's a know fault. It should be possible to order the chip with the firmware loaded then and replace the offending item if that's all it is.

I know you can with panasonic unless LG just sells the blank and it needs to be programmed.

has anyone nailed it to a particular IC?

[anotherdude]

Re: LG 42PJ550 Click

Just out of interest I just downloaded the 50PJ550 firmware (from lg) and did a content compare of the epk files (42pj500 vs 50pj550) through total commander, they are both identical firmwares.

So i'm assuming the 50 board shouldn't be a issue, I think

[tw2005]

Re: LG 42PJ550 Click

Just out of interest I just downloaded the 50PJ550 firmware (from lg) and did a content compare of the epk files (42pj500 vs 50pj550) through total commander, they are both identical firmwares.

So i'm assuming the 50 board shouldn't be a issue, I think

There'd be more than one lot of firmware on the board and not all would be flashed with the file you have.

Going back to my panasonic as example, there are 4 different flash chips some of which configure it for the size, another has the regional settings.

So now that you're talking in an area I don't understand, what do you mean by a content compare of EPK?

https://www.badcaps.net/forum/attach...6&d=1394205500

[anotherdude]

Re: LG 42PJ550 Click

There'd be more than one lot of firmware on the board and not all would be flashed with the file you have.

Going back to my panasonic as example, there are 4 different flash chips some of which configure it for the size, another has the regional settings.

So now that you're talking in an area I don't understand, what do you mean by a content compare of EPK?

https://www.badcaps.net/forum/attach...6&d=1394205500

ahh now I understand better, now makes sense why you switched all the parts.

just a comparison of what was inside the file, the result being they are the same.

will wait on this board and see where it goes from there, thanks for the download

[tom66]

Re: LG 42PJ550 Click

50" panel is 1365x768, 42" is 1024x768.
It may or may not work. I wouldn't risk it myself.

[tw2005]

Re: LG 42PJ550 Click

ahh now I understand better, now makes sense why you switched all the parts.

just a comparison of what was inside the file, the result being they are the same.

will wait on this board and see where it goes from there, thanks for the download

So you have an EEPROM reader, is that how you compared the firmwares or did you just download for both models from the web?

[rigeback]

Re: LG 42PJ550 Click

If the SMPS is still clicking as mine is try warming with a hair dryer on the Power Thermistor for Limiting Inrush Current, in your picture you have one just below the relay, green colored and possibly marked SCK-086 location TH101, I am in the process of ordering 2 of these parts for my LG 50 which seem to be only available in Taiwan. Its best to do the normal boot up with TV connected using the remote.
Good luck.

[anotherdude]

Re: LG 42PJ550 Click

If the SMPS is still clicking as mine is try warming with a hair dryer on the Power Thermistor for Limiting Inrush Current, in your picture you have one just below the relay, green colored and possibly marked SCK-086 location TH101, I am in the process of ordering 2 of these parts for my LG 50 which seem to be only available in Taiwan. Its best to do the normal boot up with TV connected using the remote.
Good luck.

already determined the power board is fine as are the rest bar the main board as I got test patterns with main unplugged

also tried the recovery but the board constantly comes up saying "no nand/flash device found" so it's either corrupt or dead

decided to cancel the other board and go for this one, only problem is i can't find the difference between the N model and the normal one

http://www.ebay.co.uk/itm/350978219829

that should definatly work?

[tom66]

Re: LG 42PJ550 Click

The letters after the normal product code sometimes relate to the country so that might be Norway for example. It might affect Freeview but from what I remember that can be changed in the user menu.