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‎05-04-2021 08:42 AM - edited ‎05-04-2021 08:45 AM

HP Recommended
Product: hp z420
Operating System: Microsoft Windows 10 (64-bit)

I was using my HP z420 when it suddenly powered off.

I tried to power it back on but the power button blinks with 4 red lights.

 

What does this mean ?

Alex H.
4 REPLIES 4

‎05-09-2021 01:37 PM

HP Recommended

The RED light on the back of the motherboard blinks too

so i pressed the reset button with no success.

 

What is the process to reset the motherboard  ?

Alex H.
Was this reply helpful? Yes No

‎05-10-2021 03:41 PM

HP Recommended

This is from the Maintenance and Service Guide.

 

4x RED.JPG

 

 

 

HP Z620 - Liquid Cooled E5-1680v2 @4.7GHz / 64GB Hynix PC3-14900R 1866MHz / GTX1080Ti FE 11GB / Quadro P2000 5GB / Samsung 256GB PCIe M.2 256GB AHCI / Passmark 9.0 Rating = 7147 / CPU 17461 / 2D 1019 / 3D 14464 / Mem 3153 / Disk 15451 / Single Threaded 2551
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‎06-15-2021 11:30 AM

HP Recommended

Do you know if this computer only supports Xeon v1 CPU's ?

I have upgraded the CPU to an 8-core v2 CPU. ( E5-2650 v2 )

It was working fine for a while them this happened.

 

Alex H.
Was this reply helpful? Yes No

‎06-15-2021 11:37 AM

HP Recommended

You need to check the motherboards Boot Block Date listed in the BIOS. This is not the same as the BIOS date.

 

If it is 2011, then your mobo only supports the v1 CPU's and 1600MHz memory

 

If it is 2013, then your motherboard supports both the v1 and v2 CPU's, (and most v2 CPU's support 1866MHz memory).

 

HP Z620 - Liquid Cooled E5-1680v2 @4.7GHz / 64GB Hynix PC3-14900R 1866MHz / GTX1080Ti FE 11GB / Quadro P2000 5GB / Samsung 256GB PCIe M.2 256GB AHCI / Passmark 9.0 Rating = 7147 / CPU 17461 / 2D 1019 / 3D 14464 / Mem 3153 / Disk 15451 / Single Threaded 2551
Was this reply helpful? Yes No
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