Discovered a weird problem on a Optiplex 755 desktop tower system.
I can change any of the other available values on the system but cannot enter the boot sequence menu. The BIOS that was on the system was A17.
Updated it to A20. No change.
Oh. That wasn't the latest. Update to A21. No change.
Downgraded to A12. No change. Bumped back up to A21. No change.
Downgraded to A10. No change. Bumped back up to A21. No change.
Downgraded to A01. No change. Bumped back up to A21 No change.
If there is a password on the system when I tried to access the boot sequence menu it reminded me I needed to type it in first. After successfully entering that value, the prompt went away but I still could not get into the boot sequence.
I removed the cmos battery for 20 minutes while the system was off, put it back, booted. No change.
I replaced the cmos battery with one from another system. No change.
Tried a different keyboard. No change.
Used the jumper to reset the cmos. No change. Ran the onboard utilities. No error could be found.
If I hold the enter key while on the boot sequence menu I can see the initial splash screen and flickers of the next screen that it will not advance to.
Unplugged the system and pressed the on button for 30-60 seconds. No change.
I think this is ripe for a warranty replacement.Event_Horizon.
Hi Event Horizon,
I'm not sure if you're talking about the BIOS (F2) or the F12 advanced boot menu. Do you see the Dell logo with these prompts (F2 for system setup, F12 for advanced boot menu) when you start the system?
Please post back and let me know if you need more help.
I can still see boot menus Ctrl-P for the Intel AMT option (which has been disabled within), F12 for booting floppy, dvd, or hard drive (usb stick is not an option regardless of what is connected), and F2 for entering the BIOS. As far as I can tell the only thing that I cannot configure is the boot sequence menu while in the bios.
My coworker in charge of parts and deliveries phoned this issue into support. Simply by reading the boot menu problem to them - 'you need a new motherboard'. (This must be a known problem.) So a replacement is on its way for delivery next week.
Ok, good to hear. Please let me know if things work out.
Reinstall WIN8 IN ATA MODE.
F6 Drivers are required for AHCI out of the box.
Install ATA then INSTALL the Chip set Drivers.
Then run the microsoft fix. You should be using A22 bios for WIN8.
To resolve this issue automatically, click the Fix this problem link.
Then, click Run in the File Download dialog box and follow the steps in this wizard.
Stop 0x0000007B Inaccessible Boot Device
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