CurtPalme.com Home Theater Forum

[stuff12303]

I just picked up a hier 42ep24s (lg) has sound no pic, i have no bad fuses, from what i read the y sus board is bad, I would like to fix it, any help would be great! I have a solder desolder station, cap wizard, logic probe, and volt meter, where do i start? Why do people replace these boards rather than fix them?

[WanMan]

This is an EDTV. The question should be why do people repair these obsolete displays instead of replacing them. They are disposable. Sorry, I cannot help you.

[stuff12303]

Ok, I will throw it out as soon as you buy me a new one! Why fix anything? buy a new one!Thanks for the help DOUCH BAG

[AnalogRocks]

Hi Stuff' welcome to the forum.

Hang out for a while. Mac will likely pop in and help you.

Thanks for making me laugh this morning with the DOUCH BAG comment

[AnalogRocks]

Hi Stuff' welcome to the forum.

Hang out for a while. Mac will likely pop in and help you.

Thanks for making me laugh this morning with the DOUCH BAG comment

[stuff12303]

Thanks for the welcome, I have been fixing arcade games for about 15 years,crt monitors, and old school pcbs, Just trying some tv repair, picked up this 42" plasma and a 65" hd projection not having great luck so far.

[AnalogRocks]

[AnalogRocks]

[stuff12303]

its a ws65807 It was dead when i got it, replaced the converg chips and 2 fuses, it now works but has no green signal

[AnalogRocks]

[AnalogRocks]

[Curt Palme]

Welcome stuff. Pay no mind to Wan, he has been known to be a dbag from time to time. He likes poking the snake with a stick, he hasn't figured out yet that we bite back!

As for the LG, I too am getting into plasma repairs, but unfortunately have found that it's cheaper buying used boards on eBay than it is repairing your board. As a guy that makes his living repairing CRT PC boards, I should be the last one recommending this, but with some parts being not available, LG schematics not existing, that's probably the way to go. ONce the set is working, then compare the bad board to the good one, and chances are you'll repair it. Throw it back on eBay and get your money back.

Now, don't be so quick to write off the Ysus board. While they do fail often, most of the 10 LGs I've had here that had no pix at all weren't the Ysus board, and the ones that had bad Ysus boards had some form of image, just not a watchable one.

Macguyver is the right guy to chime in here. He's got way more experience than I do. What I wil[l say though is check all voltages going to the various boards. My LGs all had small printing next to the connectors indicating what the voltage supplies were.

Check for a faint glow of the plasma, indicating that your problem is a processor one, or low level video if it's dead. THat indicates the plasma is firing, and that the Y and Z boards are probably OK. If you get no faint light out of the plasmas, then I'd suspect either a processor or Y or Z board or power supply issue.

[Curt Palme]

Welcome stuff. Pay no mind to Wan, he has been known to be a dbag from time to time. He likes poking the snake with a stick, he hasn't figured out yet that we bite back!

As for the LG, I too am getting into plasma repairs, but unfortunately have found that it's cheaper buying used boards on eBay than it is repairing your board. As a guy that makes his living repairing CRT PC boards, I should be the last one recommending this, but with some parts being not available, LG schematics not existing, that's probably the way to go. ONce the set is working, then compare the bad board to the good one, and chances are you'll repair it. Throw it back on eBay and get your money back.

Now, don't be so quick to write off the Ysus board. While they do fail often, most of the 10 LGs I've had here that had no pix at all weren't the Ysus board, and the ones that had bad Ysus boards had some form of image, just not a watchable one.

Macguyver is the right guy to chime in here. He's got way more experience than I do. What I wil[l say though is check all voltages going to the various boards. My LGs all had small printing next to the connectors indicating what the voltage supplies were.

Check for a faint glow of the plasma, indicating that your problem is a processor one, or low level video if it's dead. THat indicates the plasma is firing, and that the Y and Z boards are probably OK. If you get no faint light out of the plasmas, then I'd suspect either a processor or Y or Z board or power supply issue.

[macgyver655]

Good advice so far. I'll just add to check the fuses on the SUS boards. I want to know if they are blown or not.

[Curt Palme]

Also, does the set stay powered up? Or does it shut down after a bit? Does it have an internal fan? If so, see if it continues to spin, indicating something other than a short. A short somewhere will usually shut down the power supply.

[Curt Palme]

Also, does the set stay powered up? Or does it shut down after a bit? Does it have an internal fan? If so, see if it continues to spin, indicating something other than a short. A short somewhere will usually shut down the power supply.

[macgyver655]

[stuff12303]

Problem fixed! The ribbon cable from the main board to the y sus was loose, how it got that way i have no idea, but i reconnected it and it fired right up, Thanks for everyones input,

[MikeEby]

[Curt Palme]

Damn, I wish they were all that easy! I got in three today to work over. One is pretty easy: The cable TV connector is snapped off. It fires up, menus are OK.

Haven't checked anything else on it or the other two. One is a 36" Sharp Aquos, a late model with two HDMI inputs. I'l bet it's fine, someone just upgraded. Whee!

[Curt Palme]

Damn, I wish they were all that easy! I got in three today to work over. One is pretty easy: The cable TV connector is snapped off. It fires up, menus are OK.

Haven't checked anything else on it or the other two. One is a 36" Sharp Aquos, a late model with two HDMI inputs. I'l bet it's fine, someone just upgraded. Whee!

[WanMan]

[Kevin D]