cancel
Showing results for 
Search instead for 
Did you mean: 
alexanderhernan
Level 3
84 50 0 1
Message 1 of 5
320
Flag Post

HP z420 - 4 blinking RED lights ?

HP Recommended
hp z420
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 Hernandez
4 REPLIES 4
alexanderhernan
Author
Level 3
84 50 0 1
Message 2 of 5
Flag Post
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 Hernandez
Reply
0 Kudos
Brian1965
Level 7
537 515 73 127
Message 3 of 5
Flag Post
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
Reply
0 Kudos
alexanderhernan
Author
Level 3
84 50 0 1
Message 4 of 5
Flag Post
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 Hernandez
Reply
0 Kudos
Brian1965
Level 7
537 515 73 127
Message 5 of 5
Flag Post
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
Reply
0 Kudos
Warning Be alert for scammers posting fake support phone numbers and/or email addresses on the community. If you think you have received a fake HP Support message, please report it to us by clicking on "Flag Post".
† The opinions expressed above are the personal opinions of the authors, not of HP. By using this site, you accept the Terms of Use and Rules of Participation