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- HP Community
- Desktops
- Desktop Boot and Lockup
- 8300-CMT Post Codes

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06-13-2025 10:42 AM
I don't understand what you mean by post codes.
The user guides page can be found at the link below:
HP Compaq Elite 8300 Convertible Minitower PC - Setup and User Guides | HP® Support
06-14-2025 10:45 AM - edited 06-14-2025 10:47 AM
Paul,
I believe Post Codes are a way Hardware Manufactures can alert PC Owners of some form of Hardware Error. These alerts are in the form of audible Beeps or LED's Flashing. the Beeps / Flashes are a Code that corresponds to a List of Codes supplied by the Hardware Manufacturer, in this case, Hewlett Packard. These Codes, while differing from manufacturer to manufacturer, originated with the original IBM PC. If I had the List for my HP 8300 CMT, I would be able to "diagnose" what might be preventing my PC from Booting. Does this explanation help you identify if there is a List of these Codes in the Forums Archives? If so, can you please refer me to it?
Mike
The user guides page can be found at the link below:
HP Compaq Elite 8300 Convertible Minitower PC - Setup and User Guides | HP® Support
- English
©2025 HP Development Company, L.P. The information contained herein is subject to change without notice.
Paul,
I believe Post Codes are a way Hardware Manufactures can alert PC Owners of some form of Hardware Error. These alerts are in the form of audible Beeps or LED's Flashing. the Beeps / Flashes are a Code that corresponds to a List of Codes supplied by the Hardware Manufacturer, in this case, Hewlett Packard. These Codes, while differing from manufacturer to manufacturer, originated with the original IBM PC. If I had the List for my HP 8300 CMT, I would be able to "diagnose" what might be preventing my PC from Booting. Does this explanation help you identify if there is a List of these Codes in the Forums Archives? If so, can you please refer me to it?
06-14-2025 11:10 AM
I'm not going to write anything further than to inform you that what you are referring to (which are called Post Error Messages, not post codes) can be found in chapter 11 of the maintenance and service guide on your PC's user guides section that I posted yesterday, so I don't know why you wrote that my reply was not helpful.
All you needed to do was look.
I saw nothing wrong in my asking you what you meant by post codes, so if you took it personal, my apologies.