Question about Compaq Evo D500 PC Desktop

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1801 Microcode Patch Error

I bought a Compaq Computer, 2.0Ghz, 256MB, 20GB for my College project. When i put the power on, it restarts almost immediately (so many times repeatedly). Then after such reboots, it successfully brings a message "1801 - Microcode Patch Error" and a F1-Boot directive. Pressing F1 boots properly. until next boot... the same problem. SOS

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  • franzgamz Jun 07, 2008




    Compaq Evo D500 PC Desktop has the same error when i replace my procesor from 1.7ghz to 1.8ghz


  • Anonymous Oct 22, 2008

    same thing whit me but i have a 733 mhz now upgraded to 1000 mhz



    compaq deskpro

  • dewalt2004 Apr 22, 2009

    I have a desk pro en thatI upgraded from a celeron 733 to a pentium III 1.0 gig. I get the error 1801 microcode get new bios chip upgrade from compaq.

    will a bios flahs take care of it?? help

    Dewalt2004

  • georgebaah18 May 11, 2010

    when i start my compaq computer, 266GHZ the message i recieve is invalid microcode patch,i should contact compaq. PLEASE HELP ME SOLVE THIS PROBLEM

  • Anonymous Mar 29, 2014

    Error

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I bought a Compaq Computer, 2.0Ghz, 256MB, 20GB for my College project. When i put the power on, it restarts almost immediately (so many times repeatedly). Then after such reboots, it successfully brings a message "1801 - Microcode Patch Error" and a F1-Boot directive.

Posted on Sep 22, 2008

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    An expert whose answer got voted for 2 times.

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I upgraded the CPU in my Deskpro D510 to the fastest processor the model will take. After the upgrade, I got the 1801 microcode error. Downloading the newest BIOS from HP/Compaq solved the problem for me.

Posted on May 25, 2010

Upgrade your rom bios ..

Imad, IT from l'atelier informatique, morocco

Posted on Apr 01, 2008

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1 Answer

"1801 Microcode patch error. Missing


http://h20000.www2.hp.com/bizsupport/TechSupport/SoftwareDescription.jsp?lang=en&cc=us&prodTypeId=12454&prodSeriesId=96295&prodNameId=97121&swEnvOID=1093&swLang=13&mode=2&taskId=135&swItem=PSG_I15378-37635

And follow the instructions here to upgrade the BIOS. I suggest using their instructions as they will be far more accurate than mine for this specific system and BIOS update.

Feb 10, 2011 | Compaq Evo D500 PC Desktop

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I just install 2.0GHz processor but my system keep giving 1801 microcode patch error, what do i do?


The 1801 error is defined as:
Missing or invalid Processor Microcode Patch.

Resolved by:
Applying a new ROM BIOS to support the processor stepping.

In other words, you need a BIOS upgrade. Contact your BIOS vendor and get support for your new processor.

Sep 12, 2010 | Compaq Computers & Internet

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I have i 1801-microcode patch error missing or


from the error code i am going to quess you have a compaq
ok and i hope this helps download the following.
Presario Desktop Models System ROM Update (686Y2 Family ROM) and please read the directions to download. I have made a lot of assumptions here, i dont know your OP system and guessing on the machine type so please bare with me. Best of luck Mel

Jun 09, 2010 | Computers & Internet

1 Answer

1801-microcode patch error


Hi according to HP memo see the following answer hope it help:

DESCRIPTION After installing a different system board or processor in systems described in the "Scope," the systems may halt during POST and display an 1801 Microcode Patch Error with a prompt to press the F1 key to continue.
NOTE Pressing the F1 key will allow the system to continue. However, processor performance may not be optimized and the error will repeat each time the system is restarted. HP recommends that the microcode be updated to ensure optimum compatibility and performance.

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Try to update BIOS, it might solve your problem

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http://admin.utep.edu/Default.aspx?tabid=56

Try downloading the 815 motherboard drivers on the right side of the page.

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These are very different CPU's, and you should make sure the board accepts the new one. Check the manual.

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