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Dell Optiplex GX110 board

daewoo 2800

daewoo 2800

Experienced Member
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Feb 11, 2024
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So in the big box of MB's i bought it has a Dell MX-0002TR board
and i'm looking for a PSU or possibly an adaptor to use a standard ATX PS.
Dell site talks about it but links are dead.
Can't use a standard PS due to Dell has a different pinout on the PS.

dell gx110 PSU.jpg

any info would be helpful!!

thanks for your input or even taking the time to read this
 
The adaptor for ATX to Dell with Aux 6 pin came but i don't see any
way to turn on the computer....I know very little about Dells
There is a 9 pin labeled "Panel" but i think its for USB's..

is there a keyboard key(s) on/off switch for Dells?
GX110 or 51XGM
 
There are no front panel USB connectors on the GX110. The panel connector is for the power/reset buttons and power/HDD LEDs.

From pictures online, it looks like pin 1-2 may be the power button, 3-4 may be reset, 5-6 is the power LED and 7-8 is the HDD LED. You can try shorting pins 1-2 with a screwdriver and see if the machine turns on.
 
according to the manual, there is an aux LED on the MB(at about 4oclock from the battery) and on the
riser that should come on but I'm not sure if they are on when PSU is plugged in or when you turn on the computer.....
i have a harness that i've been using in place of the screwdriver, i also like having the LEDs ;~)

looks like there is an intrusion switch on this computer but i don't see any place that a switch
would plug in on the MB . is that connected to the power switch circuit? maybe on the front panel board?
 
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thanks for the link.
i DL both service and user manuals last night.
not a lot of real info on the technical support end .
i saw the pictures and the description.

wouldn't matter if your jumping the MB pins anyway.
the intrusion sw just "interrupts" the on-switch. or not.

i did some voltage readings of the pins
0 0 0 - + < 2.3v>
x 0 0 0 9
everything else was under a volt.
jumping the 2 pins that have voltage doesn't work.
gx110 pane2l.jpg
 
Nothing happens when jumping 7&8 or 9&10
the voltage between
9&10 is 2.3v
8&10 is 2.5v
7&8 is 0 (both neg?)
7&10 is 2.3v

shouldn't all voltage measurements with pin 10 be the same
with ground???
so 7,8,&9 should give the same reading with pin 10?
they are close with 8&10-- 0.2v difference
 
I don't know what the voltages should be, but I found this page:


gx1pnl.gif
gx1pnl.gif


If you follow the traces, it looks like the power button is from pin 2 to pin 3. Maybe it's the two pins circled below? Sort of strange to not have the pins side by side, but it is Dell we're talking about.

1711327595649.png
 
wow , you went all the way back to 2009 to find this!
the goodold WayBack Machine, I'm glad somebody has to
server space to do that along with the desire
i'll give it a go later tonight.
 
no luck on pins 2&3.
even tried to jump start the PSU by the paperclip trick between
green(Dell uses turquoise) and black wire from the backside of the plug.
no fan or nothing, i know my test PSU works

i would like the fan or a LED to come on at least so i know power is running through the board..
anyway, thanks GigaBite, you go way beyond the call of duty!!!


VERAULT said:
Thanks for the link. I bought one so i could fix my Dell GX1. Hope it works
Click to expand...
hope it works for you, good luck!
 
I guess the next step would be to buy one of those front panel boards with the ribbon cable, if they're even available still.
 
wheres the wayback machine for things, when you need it?
there is a chance the ATX jumper to dell is faulty.

a guy could solder jumpers from the main power input to the AUX 6 pin,
3 are ground and 2 are orange/3v and 1 red/5v (hope i remembered that right)
all the other wires are straight through on the harness..
anyway the next guy with this MB can just solder some jumper wires
and breadboard it and use an ATX PSU

gx110 inputs.jpg

i'm guessing but why have a separate set of power inputs
unless its for separate things that would put noise on the line?
 
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The extra "Aux Power" connector was common on late PIII motherboards, especially on server boards with multiple sockets. It was used to provide extra current carrying capability to the CPU power regulators.

I've had several boards with the aux power connector, and currently still have one in infrequent service, a P3TDDE with 2 x PIII-S 1400 CPUs.


HOWEVER, Dell being the scumbags they were, had a different aux connector, BUT this only applied to some machines. So you could have either a 5v or a 3v3 sense wire.


According to this picture of a GX110 power supply:

The aux connector has three black, two blue and one blue with a white stripe wires. I'm going to make a guess that the blue wire with a white stripe makes that a 3v3 sense wire and not a +5v wire. Applying 5 volts to that pin on the board is likely to damage something.
 
as per my previous post picture this AUX-6pin adaptor is wrong
according to the info you posted
.
the adaptor is connected to red (5v) wire should be the sense wire?
if so 5v has already been connected to the last AUX pin.

anyway i found a picture of the back side of the power panel board
GX110 PCB BACK2.jpg
i read that one bank of pins was negtive and the other was positive, and i think you found the same info?
but that is wrong because the LEDs
come off the same even or odd-numbered pin side.
the intrusion pin and the reset switch only have one leg going to the pins
the other comes from the large pad/trace
not sure what the the pin (marked ?) is and where it comes from
looks like the LED?? there is nothing else there

GX110 PCB FRONT.jpg

anyway i found 3 panels on the net and will buy one today...
 
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comparing the dell p2/3 and standard ATX PSU
it says i'm screwed?? ;-(

dell p2&3-- ATX.jpg
the ATX to Dell adapter is straight through no wires were routed to different pins...
 
So at this point, you have multiple problems. You can't trust the pigtail adapter you have, the motherboard may have been damaged by it and the front panel header isn't responding.

I think the only hope for this motherboard is finding a GX110 chassis with the OEM power supply and front panel board.
 
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