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Weird motherboard problem

post #1 of 6
Thread Starter 
I got a Supermicro P4SCT+II in trade. I put it together on my test table with a 3.2ghz P4 Northwood with a stock Intel HS/Fan and 2x1gb DDR400 Crucial memory. It powers up as soon as I turn on the power supply WITHOUT shorting the power ON/OFF pins. I figured ya, I've seen that before so I kind of ignored it. But it would not power off either by shorting the power ON/OFF pins (CPU fan keeps running). I decided to hook up a CD-ROM and a hard drive to see if it works otherwise. It installed Win XP Pro fine. Installed all the drivers fine. No problems. It works great. So I shut down Windows and it APPEARS to shut down OK (monitor turns off) but the CPU fan is still running. Then I hit the eject button on the CD-ROM and it ejects the Windows XP CD. The setup is still powered up! Just the monitor is off. I short the power ON/OFF pins. Nothing happens. Flip the on/off switch on the power supply to off and everything shuts down, of course. Flip the switch on the power supply switch to on and the board turns on and loads Windows.

So I have a board that works great but has an ON/OFF problem.
Things I have tried:
Different CPU/different HS/Fan/different memory/different memory slots/different power supply/flashed motherboard to the newest BIOS/tried different ACPI power schemes in the BIOS (it has for options: S1/S3/S1+S3 for options)/I even disabled ACPI and reinstalled Windows with the F7 option. Right now the Computer properties in the Device Manager is MPS Multiprocessor PC. So when you shut down it says It is now safe to turn off your computer. But it will not shut off by shorting the power ON/OFF pins. The monitor stays on/CPU fan is still running/CD-ROM ejects. Only way to shut it all off is flip the switch on the power supply.

Anyone have any ideas? I really would like to use this board as a home server. It has 6 SATA ports and would run a bunch of hard drives.
Ivy Bridge
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Ivy Bridge
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CPUMotherboardGraphicsRAM
i7 3770K@4300mhz everyday setting Asus P8Z77-V LE EVGA GT275 OC 2x8gb GSkill Tridents DDR3 2400mhz 
Hard DriveOptical DriveCoolingOS
2x300gb Raptors/1xWD 320gb Asus DVD-RW XigmaTek Dark Knight SD1283 Night Hawk Edition Windows 7 Pro x64 
MonitorKeyboardPowerCase
LG W2252TQ Logitech 104 Corsair HX620W Antec P180B 
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post #2 of 6
Are you going to be shutting it down as a server. If so, sounds like the perfect board. Please excuse my attempt at humor. This is the weirdest thing that I have ever heard but if you are gonna use it for a server you could set the power settings and leave it on permanently.. BTW. What happens when you hit restart.?
    
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Phenom II 940 BE ASUS M3A32-MVP DELUXE Wifi Sapphire 5770x2 Crossfire 4 Gb. of G.Skill 5-5-5-15 1066 
Hard DriveOptical DriveOSMonitor
SSD 60g OS. 500GB + 300 GB VelociRaptor 10000 rpm PLEXTOR PX-850SA Windows 7 Professional SAMSUNG 920 BW 
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Saitek Cyborg HX1000 Watt Corsair modular CM STACKER ENIGMA EDITION Microsoft SideWinder Gaming Mouse 
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post #3 of 6
Thread Starter 
When I hit restart it restarts as it should with no problems.
Ivy Bridge
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CPUMotherboardGraphicsRAM
i7 3770K@4300mhz everyday setting Asus P8Z77-V LE EVGA GT275 OC 2x8gb GSkill Tridents DDR3 2400mhz 
Hard DriveOptical DriveCoolingOS
2x300gb Raptors/1xWD 320gb Asus DVD-RW XigmaTek Dark Knight SD1283 Night Hawk Edition Windows 7 Pro x64 
MonitorKeyboardPowerCase
LG W2252TQ Logitech 104 Corsair HX620W Antec P180B 
MouseMouse Pad
Logitech MX510 steelseries 
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Ivy Bridge
(14 items)
 
  
CPUMotherboardGraphicsRAM
i7 3770K@4300mhz everyday setting Asus P8Z77-V LE EVGA GT275 OC 2x8gb GSkill Tridents DDR3 2400mhz 
Hard DriveOptical DriveCoolingOS
2x300gb Raptors/1xWD 320gb Asus DVD-RW XigmaTek Dark Knight SD1283 Night Hawk Edition Windows 7 Pro x64 
MonitorKeyboardPowerCase
LG W2252TQ Logitech 104 Corsair HX620W Antec P180B 
MouseMouse Pad
Logitech MX510 steelseries 
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post #4 of 6
Sounds to me like the main power pins on the motherboard are bad, or shorting. Strange that the exact pins needed for power-on are the ones that are shorted, but stranger things have happened.

What you haven't tried, according to your diagnostics list, is a different motherboard.
It's Disturbing
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It's Disturbing
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post #5 of 6
Thread Starter 
Solved by a member on another forum...

jkerr2 wrote:The motherboard manual seams to indicate that there is a jumper jp20. That forces power on. If the manual is correct the jumper is close to the main atx power connector. Open is disabled.

BINGO!!! jkerr2 just nailed it! Give that man a cigar. That is what was wrong. Took the jumper off the 2 pins on jp20 and everything works fantastic now! Thanks so much, I completely overlooked that.

PROBLEM SOLVED!
Ivy Bridge
(14 items)
 
  
CPUMotherboardGraphicsRAM
i7 3770K@4300mhz everyday setting Asus P8Z77-V LE EVGA GT275 OC 2x8gb GSkill Tridents DDR3 2400mhz 
Hard DriveOptical DriveCoolingOS
2x300gb Raptors/1xWD 320gb Asus DVD-RW XigmaTek Dark Knight SD1283 Night Hawk Edition Windows 7 Pro x64 
MonitorKeyboardPowerCase
LG W2252TQ Logitech 104 Corsair HX620W Antec P180B 
MouseMouse Pad
Logitech MX510 steelseries 
  hide details  
Reply
Ivy Bridge
(14 items)
 
  
CPUMotherboardGraphicsRAM
i7 3770K@4300mhz everyday setting Asus P8Z77-V LE EVGA GT275 OC 2x8gb GSkill Tridents DDR3 2400mhz 
Hard DriveOptical DriveCoolingOS
2x300gb Raptors/1xWD 320gb Asus DVD-RW XigmaTek Dark Knight SD1283 Night Hawk Edition Windows 7 Pro x64 
MonitorKeyboardPowerCase
LG W2252TQ Logitech 104 Corsair HX620W Antec P180B 
MouseMouse Pad
Logitech MX510 steelseries 
  hide details  
Reply
post #6 of 6
Quote:
Originally Posted by Lipservice View Post
Solved by a member on another forum...

jkerr2 wrote:The motherboard manual seams to indicate that there is a jumper jp20. That forces power on. If the manual is correct the jumper is close to the main atx power connector. Open is disabled.

BINGO!!! jkerr2 just nailed it! Give that man a cigar. That is what was wrong. Took the jumper off the 2 pins on jp20 and everything works fantastic now! Thanks so much, I completely overlooked that.

PROBLEM SOLVED!
PM me please the other forum
OverKill
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OverKill
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AMD Phenom II X6 1055T Gigabyte 890FXA ATI FirePro V3800 ATI FirePro V3800 
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16gb GSkill 10666 Seagate Western Digital  LG Blue Ray 
CoolingOSMonitorMonitor
stock air 7 Pro 64 bit (2)22" Acer x223w (2)23" Acer G235H 
KeyboardPowerCaseMouse
Microsoft Wireless Antec 900watt Antec 300 Wacom Tablet 
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Logitech Speakers and sub 
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