HP z400 mobo won't boot or POST

[Kazteel]

My old motherboard in my Dell studio xps 9100 recently went out. I wasn't planning on putting money into it but with it being my only computer I had to find a mobo that I could put into it for cheap just to get it running until I have enough money to build me a brand new rig. Any who I got everything connected. Found the power pins. Used a screw driver to turn it on since my power switch won't work on it without modification. It powers up for a sec then powers off. No POST or anything.....can anybody help me with what's going on here?

Update #1 : Currently testing it on a breadboard setup. Although the original metal underplating on the mobo is still on because I don't have an h15 bit to unscrew it. Could the metal underplating that come with the mobo be the problem?

Update #2 : Just tried to get it to POST with nothing in it just the 4pin atx connector and the 24 pin connector and I get no POST, nor fan turn ons.

Update #3 : Just tried turning on mobo with processor in it and it spins up for a split second then shuts off. Could this be an indicator for something?

Current Hardware
Power Supply : EVGA Supernova 850 G2 Gold rated rails.
CPU : Original i7. Not sure exact model. I think it's a 960
RAM : G. Skill Ripjaw DDR3-1600 PC3-12800 4x2 8gigs total.
GPU : ATI Radeon r9 285x

 

[Pentium4User]

My old motherboard in my Dell studio xps 9100 recently went out. I wasn't planning on putting money into it but with it being my only computer I had to find a mobo that I could put into it for cheap just to get it running until I have enough money to build me a brand new rig. Any who I got everything connected. Found the power pins. Used a screw driver to turn it on since my power switch won't work on it without modification. It powers up for a sec then powers off. No POST or anything.....can anybody help me with what's going on here?

Update #1 : Currently testing it on a breadboard setup. Although the original metal underplating on the mobo is still on because I don't have an h15 bit to unscrew it. Could the metal underplating that come with the mobo be the problem?

Update #2 : Just tried to get it to POST with nothing in it just the 4pin atx connector and the 24 pin connector and I get no POST, nor fan turn ons.

Update #3 : Just tried turning on mobo with processor in it and it spins up for a split second then shuts off. Could this be an indicator for something?

Current Hardware
Power Supply : EVGA Supernova 850 G2 Gold rated rails.
CPU : Original i7. Not sure exact model. I think it's a 960
RAM : G. Skill Ripjaw DDR3-1600 PC3-12800 4x2 8gigs total.
GPU : ATI Radeon r9 285x

Ok this board is kinda a mind twist. Do you know the bios version you have because there old posts talking about the i7 only some will work because the z400 was designed for xeons only. and ram stuff. this board just a headache. there a dell studio 9100 on ebay for 80 bucks http://www.ebay.com/itm/DELL-STUDIO-XPS-9100-5DN3X-Motherboard-Intel-LGA-1366-DDR3-C1431-/232348934521?hash=item3619136179:g:VbcAAOSwX61ZJvuT
The issue I think is the cpu because my laptop does the same if a cpu not supported by the board. It would turn on for 3 or 5 sec and turn off. and here the hp z400 spec sheet https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=7&cad=rja&uact=8&ved=0ahUKEwinmuPd-eDUAhULS2MKHW_jArEQFghEMAY&url=http%3A%2F%2Fwww.hp.com%2Fcanada%2Fproducts%2Flanding%2Fworkstations%2Ffiles%2F13276_na.pdf&usg=AFQjCNFp-lAZipC_x2jUlyb_a8XhZkZwzA If you want to see the ram supports and cpu.

 

[Kazteel]

My old motherboard in my Dell studio xps 9100 recently went out. I wasn't planning on putting money into it but with it being my only computer I had to find a mobo that I could put into it for cheap just to get it running until I have enough money to build me a brand new rig. Any who I got everything connected. Found the power pins. Used a screw driver to turn it on since my power switch won't work on it without modification. It powers up for a sec then powers off. No POST or anything.....can anybody help me with what's going on here?

Update #1 : Currently testing it on a breadboard setup. Although the original metal underplating on the mobo is still on because I don't have an h15 bit to unscrew it. Could the metal underplating that come with the mobo be the problem?

Update #2 : Just tried to get it to POST with nothing in it just the 4pin atx connector and the 24 pin connector and I get no POST, nor fan turn ons.

Update #3 : Just tried turning on mobo with processor in it and it spins up for a split second then shuts off. Could this be an indicator for something?

Current Hardware
Power Supply : EVGA Supernova 850 G2 Gold rated rails.
CPU : Original i7. Not sure exact model. I think it's a 960
RAM : G. Skill Ripjaw DDR3-1600 PC3-12800 4x2 8gigs total.
GPU : ATI Radeon r9 285x

Ok this board is kinda a mind twist. Do you know the bios version you have because there old posts talking about the i7 only some will work because the z400 was designed for xeons only. and ram stuff. this board just a headache. there a dell studio 9100 on ebay for 80 bucks http://www.ebay.com/itm/DELL-STUDIO-XPS-9100-5DN3X-Motherboard-Intel-LGA-1366-DDR3-C1431-/232348934521?hash=item3619136179:g:VbcAAOSwX61ZJvuT
The issue I think is the cpu because my laptop does the same if a cpu not supported by the board. It would turn on for 3 or 5 sec and turn off. and here the hp z400 spec sheet https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=7&cad=rja&uact=8&ved=0ahUKEwinmuPd-eDUAhULS2MKHW_jArEQFghEMAY&url=http%3A%2F%2Fwww.hp.com%2Fcanada%2Fproducts%2Flanding%2Fworkstations%2Ffiles%2F13276_na.pdf&usg=AFQjCNFp-lAZipC_x2jUlyb_a8XhZkZwzA If you want to see the ram supports and cpu.

Is there any way to determine 100% sure if it's the cpu or mobo before I order this other mobo? Would the z400 perhaps POST but give the cpu code if my i7 was bad? I'd hate to order this other mobo just to find out my cpu is fried and not my mobo.

 

[Pentium4User]

My old motherboard in my Dell studio xps 9100 recently went out. I wasn't planning on putting money into it but with it being my only computer I had to find a mobo that I could put into it for cheap just to get it running until I have enough money to build me a brand new rig. Any who I got everything connected. Found the power pins. Used a screw driver to turn it on since my power switch won't work on it without modification. It powers up for a sec then powers off. No POST or anything.....can anybody help me with what's going on here?

Update #1 : Currently testing it on a breadboard setup. Although the original metal underplating on the mobo is still on because I don't have an h15 bit to unscrew it. Could the metal underplating that come with the mobo be the problem?

Update #2 : Just tried to get it to POST with nothing in it just the 4pin atx connector and the 24 pin connector and I get no POST, nor fan turn ons.

Update #3 : Just tried turning on mobo with processor in it and it spins up for a split second then shuts off. Could this be an indicator for something?

Current Hardware
Power Supply : EVGA Supernova 850 G2 Gold rated rails.
CPU : Original i7. Not sure exact model. I think it's a 960
RAM : G. Skill Ripjaw DDR3-1600 PC3-12800 4x2 8gigs total.
GPU : ATI Radeon r9 285x

Ok this board is kinda a mind twist. Do you know the bios version you have because there old posts talking about the i7 only some will work because the z400 was designed for xeons only. and ram stuff. this board just a headache. there a dell studio 9100 on ebay for 80 bucks http://www.ebay.com/itm/DELL-STUDIO-XPS-9100-5DN3X-Motherboard-Intel-LGA-1366-DDR3-C1431-/232348934521?hash=item3619136179:g:VbcAAOSwX61ZJvuT
The issue I think is the cpu because my laptop does the same if a cpu not supported by the board. It would turn on for 3 or 5 sec and turn off. and here the hp z400 spec sheet https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=7&cad=rja&uact=8&ved=0ahUKEwinmuPd-eDUAhULS2MKHW_jArEQFghEMAY&url=http%3A%2F%2Fwww.hp.com%2Fcanada%2Fproducts%2Flanding%2Fworkstations%2Ffiles%2F13276_na.pdf&usg=AFQjCNFp-lAZipC_x2jUlyb_a8XhZkZwzA If you want to see the ram supports and cpu.

Is there any way to determine 100% sure if it's the cpu or mobo before I order this other mobo? Would the z400 perhaps POST but give the cpu code if my i7 was bad? I'd hate to order this other mobo just to find out my cpu is fried and not my mobo.

Was the original board doing the same because there no way to determine if the cpu bad unless you have a pc diagnostic card or another motherboard. And cpu fail rarely the only way I know a cpu would go bad is 1 it cooks it self to death 2 power supply kills the cpu only way that happens is when you buy the $12 specials on ebay. And if you really don't want to buy another motherboard.
You also could buy one of the cpu supported by the board xeon W4570 is around 30 bucks on ebay http://www.ebay.com/itm/Intel-Xeon-W3570-3-2GHz-Quad-Core-CPU-Processor-SLBES-LGA1366-CPU4927-/263061743194?hash=item3d3fb3a65a:g:jJMAAOSw0j9ZVC4Q and you can see if it post.

 

[Kazteel]

[/quotemsg]
Was the original board doing the same because there no way to determine if the cpu bad unless you have a pc diagnostic card or another motherboard. And cpu fail rarely the only way I know a cpu would go bad is 1 it cooks it self to death 2 power supply kills the cpu only way that happens is when you buy the $12 specials on ebay. And if you really don't want to buy another motherboard.
You also could buy one of the cpu supported by the board xeon W4570 is around 30 bucks on ebay http://www.ebay.com/itm/Intel-Xeon-W3570-3-2GHz-Quad-Core-CPU-Processor-SLBES-LGA1366-CPU4927-/263061743194?hash=item3d3fb3a65a:g:jJMAAOSw0j9ZVC4Q and you can see if it post.

[/quotemsg]

The older mobo actually does do the same thing. I can't get either to post. Just spins up for a sec then dies off. And I don't have a cheapo PSU as you can see from my hardware list. Thing cost me damn near 150. But since both mobos are doing the same thing with the same processor.....I'm thinking it could be my processor. I won't know until I get that replacement oem board you suggested. If it does the same thing then I'm going to say the cpu is bad and order me a new one of those too.