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Motherboard will NOT posts ?

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First post, by Intel486dx33

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I am working on my Pentium MMX 200 build but the motherboard will not start.
I see the keyboard light turn on.
Drives get power.
I only have the video card connected.
IDE cables are disconnected.
Removed the ram. I tried with ram too.

Here is my Motherboard.
Gigabyte GA-586ATX2
https://www.gigabyte.com/dk/Motherboard/GA-58 … #support-manual

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Last edited by Intel486dx33 on 2020-05-16, 18:13. Edited 3 times in total.

Reply 3 of 34, by Horun

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Have you checked the volts off the 2- VRM's ? One should be 3.3v the other 2.8v for MMX 200.

Hate posting a reply and have to edit it because it made no sense 😁 First computer was an IBM 3270 workstation with CGA monitor. 🤣

Reply 4 of 34, by Intel486dx33

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Yeah, I have it in the case all secure. I guess that removing it from the case and trouble shooting it on a workbench is the logical thing to do.
Maybe tomorrow. I will have time then.

Reply 6 of 34, by Intel486dx33

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evasive wrote on 2020-05-16, 18:46:

Replace the CR2032 battery with a brand new one first. Classic symptoms of a flat CMOS battery this.

Thx, I will try it first.

Reply 11 of 34, by Horun

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Manual says Supports Fast Page / EDO 60nS or 70nS DRAM. I noticed the manual did not state but am assuming the DIMM's are 5volt, not 3.3v

Hate posting a reply and have to edit it because it made no sense 😁 First computer was an IBM 3270 workstation with CGA monitor. 🤣

Reply 12 of 34, by Intel486dx33

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I really hate it when the motherboard will not post in a new build.
Especially when I have it all put together in the case.

Well, I guess I should bench tests these motherboard before putting them into a case.

So I am just putting this off until I get up enough patients to take it apart.

I am starting to hate working with computer hardware because it cuts and pokes at your fingers.

Last edited by Intel486dx33 on 2020-05-18, 14:13. Edited 1 time in total.

Reply 13 of 34, by austinham

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dumb question. Are the dip switches newer the CPU socket set right?
https://stason.org/TULARC/pc/motherboards/G/G … GA-586ATX2.html

Do you have a older none MMX CPU to test in the board ?

Last edited by austinham on 2020-05-21, 03:37. Edited 2 times in total.

Reply 14 of 34, by evasive

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Boards supports MMX's but it can never hurt to try another.

https://www.gigabyte.com/microsite/121/tech_mmxtable.htm
@Intel486dx33
Done the additional basic troubleshooting?
Does it power on by itself when you connect the mains or only after you short the power switch pins on the board momentarely? It's possible the +5/+12V is ok but the +3.3V is gone on the power supply.
Checked the underside of the board for any damage?
Checked the slots for any debris?

Reply 16 of 34, by Intel486dx33

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Okay, I double checked the switches and they appear right fo this CPU.
I removed the ram and plugged in a PC diagnostic card.
I powered it on and the motherboard does not respond.
Keyboard check lights flash once but that’s it.
I receive no diagnostic code on the card.
Nothing not even a flashing light.

Reply 17 of 34, by austinham

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Intel486dx33 wrote on 2020-05-20, 17:12:
Okay, I double checked the switches and they appear right fo this CPU. I removed the ram and plugged in a PC diagnostic card. I […]
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Okay, I double checked the switches and they appear right fo this CPU.
I removed the ram and plugged in a PC diagnostic card.
I powered it on and the motherboard does not respond.
Keyboard check lights flash once but that’s it.
I receive no diagnostic code on the card.
Nothing not even a flashing light.

wait no ram in the system?

Reply 18 of 34, by dionb

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Horun wrote on 2020-05-17, 21:52:

Manual says Supports Fast Page / EDO 60nS or 70nS DRAM. I noticed the manual did not state but am assuming the DIMM's are 5volt, not 3.3v

Er no, i430TX chipset drives 3.3V SDRAM or EDO DIMMs, not 5V

Reply 19 of 34, by Horun

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dionb wrote on 2020-05-20, 17:23:
Horun wrote on 2020-05-17, 21:52:

Manual says Supports Fast Page / EDO 60nS or 70nS DRAM. I noticed the manual did not state but am assuming the DIMM's are 5volt, not 3.3v

Er no, i430TX chipset drives 3.3V SDRAM or EDO DIMMs, not 5V

Ok thanks for the 3.3volt. The Gigabyte manual just says (direct quote):
DRAM MEMORY − 4 banks 72 pins SIMM module socket on board. − 2 banks 168 pins DIMM module socket on board. − Use 4 / 8 / 16 / 32 / 64 /128 MB 60~70 ns SIMM module DRAM. − 8 ~ 256 MB DRAM size. − Supports Fast Page / EDO DRAM access mode.

Hate posting a reply and have to edit it because it made no sense 😁 First computer was an IBM 3270 workstation with CGA monitor. 🤣