I recently brought home a 19" gateway vx930 flatscreen monitor with an LG tube.
Whoever set it to the curb hacked the vga cord off.
I bought a solderless vga port and have it wired up and the picture on this thing is amazing, must have low hours on it. Its a decent monitor capable of 1600x1200 at 95hz I cant believe someone hacked it and tossed it.
Anyway... I have small black,orange,white, and purple wires leftover that are for monitors ID data so that the operating system knows what res and refresh rates the monitor is capable of. Right now windows detects it just as generic vga monitor and i cant change the resolution.
Anyone ever wired a gateway crt or similar vga (this ones from 2003) and maybe remember or could help me figure this out.
Heres some more info/pics on my reddit thread.
https://www.reddit.com/r/crtgaming/comm ... urce=share
Any help is greatly appreciated!!!
Rescued CRT monitor, cut vga cord. Fixed but left over wires
Rescued CRT monitor, cut vga cord. Fixed but left over wires
Last edited by deezdrama on Tue Feb 25, 2020 2:16 am, edited 1 time in total.
Re: Rescued CRT monitor, hacked vga cord. Fixed but left ove
Nice find man, I bet some 240p120 would look spectacular on that. Sorry I cant help with the signaling, but I hope you get it. Good luck and post pics if you get it working!deezdrama wrote:I recently brought home a 19" gateway vx930 flatscreen monitor with an LG tube.
Whoever set it to the curb hacked the vga cord off.
I bought a solderless vga port and have it wired up and the picture on this thing is amazing, must have low hours on it. Its a decent monitor capable of 1600x1200 at 95hz I cant believe someone hacked it and tossed it.
Anyway... I have small black,orange,white, and purple wires leftover that are for monitors ID data so that the operating system knows what res and refresh rates the monitor is capable of. Right now windows detects it just as generic vga monitor and i cant change the resolution.
Anyone ever wired a gateway crt or similar vga (this ones from 2003) and maybe remember or could help me figure this out.
Heres some more info/pics on my reddit thread.
https://www.reddit.com/r/crtgaming/comm ... urce=share
Any help is greatly appreciated!!!
-
buttersoft
- Posts: 383
- Joined: Sun Jul 24, 2016 7:49 am
Re: Rescued CRT monitor, hacked vga cord. Fixed but left ove
There will be ways to change the resolution without the EDID chip, you just haven't found them. It might simply be a case of disabling "hide modes this monitor cannot display" in display properties in windows. Then try a program like CRU or the Nvidia Control panel to customise resolutions. It's only going to do 1600x1200 at 75Hz, btw, it has a 96kHz scanrate limit.
Or you could try wiring up the cable fully. You can't really rely on standard colours in a VGA cable for the auxiliary wires, so you'll have to figure it out. You have a picture up on them monitor, yes? How did you identify the H- and V-sync lines? The service manual of the monitor will probably show the pinout of the VGA plug on the board, but i can't google it up, so -http://ww1.microchip.com/downloads/en/D ... 21682E.pdf - that's the datasheet for an EDID EEPROM, essentially the chip you're trying to wire up. Assuming yours is like that one, and it's likely to be, it's going to be 5V tolerant on the input pins, and vclk is vsync so already wired up. You need to get 5V, Gnd, SCL and SDA. Just don't mix up 5V and Gnd - doing that might trip your computer's powersupply into protection mode, from which it should recover after a few minutes unplugged, but it might totally smoke it.
Or you could try wiring up the cable fully. You can't really rely on standard colours in a VGA cable for the auxiliary wires, so you'll have to figure it out. You have a picture up on them monitor, yes? How did you identify the H- and V-sync lines? The service manual of the monitor will probably show the pinout of the VGA plug on the board, but i can't google it up, so -http://ww1.microchip.com/downloads/en/D ... 21682E.pdf - that's the datasheet for an EDID EEPROM, essentially the chip you're trying to wire up. Assuming yours is like that one, and it's likely to be, it's going to be 5V tolerant on the input pins, and vclk is vsync so already wired up. You need to get 5V, Gnd, SCL and SDA. Just don't mix up 5V and Gnd - doing that might trip your computer's powersupply into protection mode, from which it should recover after a few minutes unplugged, but it might totally smoke it.
Re: Rescued CRT monitor, cut vga cord. Fixed but left over w
I can live without the edid
Red,blue,green, and gray wires were larger gauge and coax with inner wires and outer shielding so I wired up RGB and their grounds. Ive read and was suggested that yellow usually is V sync so thats how I connected it.
Then I assumed Hsync was the left over coax big gray wire. And once i connected the inner gray wire to HSync I had a picture.
I just want to make sure i have the grounds right even though its got a picture right now without sync ground or regular ground connected to the vga port.
I have the outer shielding of the gray H sync and am leaning towards this being sync ground, and then whats left over is white , purple, orange, and black and again- assuming black would go to ground on the vga port.
Does this sound right?
I will probably just leave orange,purple, and white disconnected since I cant find a service manual and dont know if i want to have to dissasemble the board to chase traces down and not even sure if i could figure out the remaining edid wires even though id like them wired in correctly
https://ibb.co/vPFmwr2
https://ibb.co/HP4p0JL
https://ibb.co/F7kzK82
https://ibb.co/gvYHp00
Red,blue,green, and gray wires were larger gauge and coax with inner wires and outer shielding so I wired up RGB and their grounds. Ive read and was suggested that yellow usually is V sync so thats how I connected it.
Then I assumed Hsync was the left over coax big gray wire. And once i connected the inner gray wire to HSync I had a picture.
I just want to make sure i have the grounds right even though its got a picture right now without sync ground or regular ground connected to the vga port.
I have the outer shielding of the gray H sync and am leaning towards this being sync ground, and then whats left over is white , purple, orange, and black and again- assuming black would go to ground on the vga port.
Does this sound right?
I will probably just leave orange,purple, and white disconnected since I cant find a service manual and dont know if i want to have to dissasemble the board to chase traces down and not even sure if i could figure out the remaining edid wires even though id like them wired in correctly
https://ibb.co/vPFmwr2
https://ibb.co/HP4p0JL
https://ibb.co/F7kzK82
https://ibb.co/gvYHp00
-
buttersoft
- Posts: 383
- Joined: Sun Jul 24, 2016 7:49 am
Re: Rescued CRT monitor, cut vga cord. Fixed but left over w
The grounds are generally all connected inside the PC/GPU and inside the monitor. They don't have to be, but it's vanishingly unlikely that they won't be. The ground wires are pins 5, 6, 7, 8 and 10. You probably only need one of them connected at either end, but you don't tend to get ground loops connecting them all up, so i wouldn't sweat it.
I'm aware that VGA cables use coax for the analog lines, that was why i asked about sync specifically. I haven't seen H-sync use a coax cable, but there's no reason it couldnt. I have, however, seen black wires used for just about everything else but oddly enough never for ground in a VGA cable. No reason you couldn't but it doesn't seem to obey any standard or even common sense.
I'm aware that VGA cables use coax for the analog lines, that was why i asked about sync specifically. I haven't seen H-sync use a coax cable, but there's no reason it couldnt. I have, however, seen black wires used for just about everything else but oddly enough never for ground in a VGA cable. No reason you couldn't but it doesn't seem to obey any standard or even common sense.