LCM-22w3 new board, but display problems

[Xaeonis]

Re: LCM-22w3 new board, but display problems

It is a common issue on a certain series of 40" Samsung TV to have the EEPROM corrupted after slightly bad caps go really bad and send loads of 5V ripple to the board, which causes lots of problems with the EEPROM getting corrupted. Generally the picture gets screwed up on some modes or they don't power up at all. On the Samsung TVs it is easy to fix (shorting pin 5 and 6 on the EEPROM - this causes it to reset the EEPROM with default data.) The EDID EEPROM will be near the VGA and DVI connectors, so it should be easily to locate.

Another thing you can consider is the possibility that some programs have the ability to write the EEPROM from the computer. You may need to fix the write-protect (WP) pin to do this but it could be an option.

I have the equipment here to reprogram EEPROMs, so if you need programming and if you have a sample EDID hex file, I could program it for you.

Okay okay. I think we are getting into the realm of crap that I can handle, but seems like a really hard thing for me to get into.

I completely understand that bad caps can trash other components. Understood and acknowledged.

Could I, by myself, without any unique equipment, short these pins and bring the monitor to reset the EEPROM data?

If not, how would I go about reprogramming it from the computer? I mean, Im sure there are EEPROM data writers out there for monitors, but really, how would I go about it? Save the EDID data stripped from it, send it to you, you reprogram it? Wouldnt you have to have the detailed information for what the monitor is SUPPOSED to do in the first place?

Really, I just dont wanna bother anyone to do work for me when in another week Im just gonna buy a new mainboard and replace it. I assume then that should fix the issue as Ive already replaced the power/inverter board to a new one.

[Xaeonis]

Re: LCM-22w3 new board, but display problems

Did you see these threads?

http://www.pchelpforum.com/xf/thread...r-1714.121966/

http://www.tomshardware.com/forum/29...detected-wrong

Both of those fail to yield solutions to anything.

The first one has nothing but registry edits in it, and if the EDID is off, then the registry fixes arent going to fix something thats obviously wrong with the monitor's reporting information.

The second one stops abruptly when no one yields a response.

I spent about 2-3 hours last night googling all sorts of key words and phrases including but not limited to "LCM-22w3"+"AL1714" and incorrect resolution and whatnot.

A lot of people say to just pull the cable, try a DVI cable (which I already used after testing my VGA cable as well), unplug it and replug it. None of that solves anything.

[tom66]

Re: LCM-22w3 new board, but display problems

It is a common issue on a certain series of 40" Samsung TV to have the EEPROM corrupted after slightly bad caps go really bad and send loads of 5V ripple to the board, which causes lots of problems with the EEPROM getting corrupted. Generally the picture gets screwed up on some modes or they don't power up at all. On the Samsung TVs it is easy to fix (shorting pin 5 and 6 on the EEPROM - this causes it to reset the EEPROM with default data.) The EDID EEPROM will be near the VGA and DVI connectors, so it should be easily to locate.

Another thing you can consider is the possibility that some programs have the ability to write the EEPROM from the computer. You may need to fix the write-protect (WP) pin to do this but it could be an option.

I have the equipment here to reprogram EEPROMs, so if you need programming and if you have a sample EDID hex file, I could program it for you.

[retiredcaps]

Re: LCM-22w3 new board, but display problems

Did you see these threads?

http://www.pchelpforum.com/xf/thread...r-1714.121966/

http://www.tomshardware.com/forum/29...detected-wrong

[Xaeonis]

Re: LCM-22w3 new board, but display problems

The monitor settings arent proving useful at all. Nothing Ive changed in the settings are allowing it to work properly. It still not identifying as a 22in westinghouse in EDID. I even got an EDID viewer just to see - http://entechtaiwan.com/util/moninfo.shtm - and it reports the information as an Acer 1714. So the EDID of the monitor must be jacked.

A linux boot CD I dont think would change anything, as I honestly dont believe this is a windows problem at this point. I mean, its a generic pnp monitor without drivers, and since windows relies on the EDID data being correct, which it isnt, all of it points to the monitor being the issue.

I guess Im just curious as to how the EDID data could get jacked from a bad power/inverter board. Could the bad caps take out the mainboard or pieces of it due to fluctuations in the power?

The main question is - The mainboard contains all of the EDID data, correct?? Thats where the OS would get the resolutions and whatnot from, right?

When I get home Ill boot up a copy of ubuntu live I have lying around and see what happens.

One of my Nvidia cards will let you set custom display resolutions. There's a big, bold warning telling you "hardware damage" could result; I'm not sure how this could happen. Maybe on an old CRT, but not an LCD. Anyway you could try feeding it a custom resolution and see what it does.

Though I will say this - I AM able to get nvidia control panel to FORCE 1650x1050, but it is blurry as hell. Almost like its still plugged in through VGA and not DVI. Cant get the fonts to look right at ALL when that SHOULD be the monitors native resolution. (forgot to mention - the fonts look fine when its at the 'incorrect but believed' native resolution of 1280x1024 - all crisp and clear - but forced anything higher than that and the monitor goes wonky)

When I get paid in a week Ill end up buying the part (whats $20 right? I mean, I spend more than that on a dinner out with my girl), and trying it. I guess Im just moreso curious as to how this managed to happen.

[tom66]

Re: LCM-22w3 new board, but display problems

+1 on the Linux CD. Use xrandr to set display options.

One of my Nvidia cards will let you set custom display resolutions. There's a big, bold warning telling you "hardware damage" could result; I'm not sure how this could happen. Maybe on an old CRT, but not an LCD. Anyway you could try feeding it a custom resolution and see what it does.

[retiredcaps]

Re: LCM-22w3 new board, but display problems

One easy alternative is to try a linux bootable cd and see what it reports.

[selldoor]

Re: LCM-22w3 new board, but display problems

I have been reading more but probably only what youve read already.
ried this:Running 64 bit at 1680x1050 with no problems. It automatically set it to 1680x1050. You might check in the monitor settings and sure that it is not set to a 4:3 screen size instead of 16:9 or 16:10. If your getting widescreen options but no 1680x1050 it might be set to 16:9 instead of 16:10.

I did see someone who got their screen to work even though it reported as a 17inch acer but it was a bit hazy as to how it was done - editing the windows register I think.

[Xaeonis]

Re: LCM-22w3 new board, but display problems

Used both a DVI cable and a VGA cable. Both of them fail.

Tried on 3 computers, all running win7x64 - DVI on 2 of them, dvi +vga on the 3rd. All report the monitor as a AL1714 (some acer 17inch monitor) through EDID. None of them would report the correct resolution through it.

[selldoor]

Re: LCM-22w3 new board, but display problems

At that price its probably worth a try - ask if they will take it back if it fails.

Are you using or have you tried a DVI cable

[Xaeonis]

This is the story of my LCM-22w3 that had bad capacitors and how I came to find that there is absolutely no solution anywhere online for this very common problem.

I originally found out my monitor had bad caps when it was doing that on, off, orange light, high pitched squeeling sound turning on. I knew the monitor was going bad, so I looked up guides and info and whatnot. Most everyone pointed at the power/inverter board. I took it apart and lo and behold! Bad caps. Puffy, all out, etc.

Since I am TERRIBLE at soldering, and most places for a 'repair' of the caps wanted more than $40 for it, I said 'screw it - Ill just order a full replacement board'. That was a bit ago now, but last I remember, the monitor worked fine.

So I ordered a replacement DAC-19M009 - full board, new caps everything. Just got it in tonight. Replaced it fine, reassembled the monitor and bam. Turns on without a hitch.

Awesome right? Not quite. Got it hooked up to my computer and its resolution is all wonky. What? Okay, Ill fix it. I go to change it (win7x64 btw), and it says - "nope, cant do that. In fact, your monitor isnt even a westinghouse 22inch. Nope, its a Acer 17 inch with a max resolution of 1280x1024."

Okay. Huh? So, do I have a bad main board too??? Could a bad power/inverter board tear through my main board too and make it act all stupid? I assume from all of the stuff online that the EDID is messed up, and that its reporting the incorrect information. If its doing that, the only way to fix it is to replace that board correct?

Help me out with anything that could possibly help. Im dying to get this thing back to working but its just not cooperating.

Also - since the front button that auto adjusts the picture isnt working, and since its hooked up to the main board - I assume thats the issue? All Im working on is basic troubleshooting skills here.

Could I buy http://www.shopjimmy.com/cmo-35-d012479-main-board.htm THIS and replace it - would that fix the EDID?