While i was trying to change the existing ram ( EDO 64 MB ) , my old compac 1592dt cant boot as normaly , and a message appear ( non system disk or disk error ) .
i was checking my hard disk and it's ok .
i think something on bios was changed . but i can't enter to the bios setting .....
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Can you see the hard disk in the BIOS? If you cannot get into the BIOS then - The problem maybe the RAM, it faulty or just needs reseatingto make proper electrical contact. Reseat the RAM and then boot up your laptop. If it still does not boot up thenremove the RAM module/s and take them to your friendly computer repair shop andget them to test the RAM for you.
I've gist had the same problem after flashing bios ... go to BIOS and change the SATA mode to IDE. it worked for me. original instructions: also You have to turn OFF (disable) the boot from network. The error your seeing is result of the network boot rom not finding PXE server to boot from. Again, be sure to disable boot from network. PLUS it seems if only 128 MB is showing as memory then the memory sticks might be damaged and not able to retain information/data to complete the installation process. Best take them out clean it properly & replace & try again. Nothing to do with BIOS!
Dell BIOS does not have any memory related settings. Please try with only 1 GB at a time if you still get the issue, change the 1 GB with the other module. If it works with one of the 1 GB module, then but not with other then the issue is with the RAM module. If it works with 1 GB 1 at a time then the issue is that your motherboard is not supporting 2 GB.
Since your computer is used to 2 X 256 = 512 MB of memory, it could also be because of windows settings still maping to the old capacity, hence you can also try reinstalling the operating system (keep this as the last option)
The portion of the ram you don't see is being allocated to the video card. That is typical in computers to share the ram between regular use and the video card itself. 64 is being shared. Sometimes in the bios you can change the shared about but sometimes you cant.
If you want to boot your computer with disk you need to set first boot device as your cd or dvd rom. For that when you power up the computer press F1 or F2 or "del" then you can enter in bios. Then go to boot option then set first boot device as your cd ro dvd rom .then save settings and exit. Then put disk in rom then it boot with that disk. Let me know if you need more assistanse. Thanks.
You can only change the amount of video memory if your model has a videocard memory that can be dynamically changed. You're correct that it can be done, but only on specific models of notebooks. :) If you're not able to find it on the BIOS then your model might not be one of them.