watching youtube is bad, anything can be see there, some super bad.
just post here, if you need help. never youtube.
the original problem stated simply rebooting fails? what does that mean?
I guess fans still running and screen goes black, and you see it post and reload w7 to the login screen?
all by its self, that?
or what, did the fans go dead,? silent and took hand power on to gain back w7? try hard to be clear, for sure asking folks blind in a text box. more details told sights and sounds the better.
now after youtubed to death answer.: next....
my guess is PC is in legacy mode.
so all you need to do is set the boot order to HDD0 first. even turn off all else. and no disks dvd tray
and no USB devices allowed but kbd/mouse, only
then what do you see?, if it still fails, to boot HDD0 them re-seat the 2 cables to HDD 0, and to BLUE SATA jack on most dells, means HDD0 primary port.= blue
then if that fails, turn on UEFI. in BIOS. (if fails turn it off) if wrong this you get F1 , boot fails for sure.
if you reset the BIOS then you messed up UEFI mode, if was used, or the reverse, Ill never tell what is default in any BIOS after all up to ~ 20 revisions and no docs, to see what dell did,but all you do is look in F2.pages.
the BIOS has these key areas, present , missing or set wrong.
UEFI. !!!!
TPM (off is normal , 99% of the time) I call this CIA mode.
fast boot. (turned of forces SAFE MODE, slow boot BUT SURE)
secure boot. !!!! (zero tolerance for wrong)
safe boot. (other media no boot but HDD0 does )
Sata ports disabled. (F2 menus) (really bad of disabled.)
Boot to PXE, disable all PXE entries to off. (mine has 2, on in boot order and one in NIC PXE (disabled)
if any above are missing (not boot order) that means PC is UEFI 0 or 1, or 2.)
resetting BIOS blind or jerking the coin cell before learning how your PC was setup is bad, but not some horror bad. we can fix it, with carefully checking the above. (settings in BIOS)
one trick to boot (1/2 the time) is power on hammer F12, and see all things that can boot and pick one.
like HDD0 ST010132 seagate legacy boot, (a fake ST drive i made up)
or HDD0 ST010132 seagate UEFI boot.
try both one a time, and if one works you learned what works.
Just an FYI that a failing or unstable PSU can also trigger random reboots (without a BSOD). This has happened to me with an EVGA PSU. In this scenario, event viewer may likely log critical kernel power issues. The longer you continue using an unstable or failing PSU, the worse it would get. You can troubleshoot by checking output voltages on the rails.
I'm not saying this is your issue, there could be a number of potential causes from what you describe and you'd need to do your own troubleshooting. I'm just mentioning that an unstable PSU could also cause these symptoms. If that is the case, you would definitely want to replace it before it damages your system.
REPLYING TO:
My Alienware X51 R2 had the problem of constantly rebooting that would start at different intervals of time of the computer being on... I am wondering how I can determine if it really is a BIOS settings vs hardware (sata wire?) vs hard drive failure issue. Is there anyone that can help me figure this out?
Thank you for reaching out to us Joe. For cases in which the computer simply goes into the No-bootable-device found, it would be best to reinstall the Operating System if you've already exhausted all options. But we would also recommend getting in touch with our Out of Warranty Team at this phone number: 1 (877) 330-9732
savvy2
3 Apprentice
•
2.5K Posts
0
August 27th, 2019 14:00
windows 7 -64bit , I presume.
carbon dated R2, is 2013, and is not that old, infact I bet has loads of UEFI features, but how many IDK.
the users manual has 5 hits for UEFI and for PXE, so do not allow PXE to be on any why from sunday.
page 14 shows. ,
savvy2
3 Apprentice
•
2.5K Posts
0
August 27th, 2019 14:00
watching youtube is bad, anything can be see there, some super bad.
just post here, if you need help. never youtube.
the original problem stated simply rebooting fails? what does that mean?
I guess fans still running and screen goes black, and you see it post and reload w7 to the login screen?
all by its self, that?
or what, did the fans go dead,? silent and took hand power on to gain back w7? try hard to be clear, for sure asking folks blind in a text box. more details told sights and sounds the better.
now after youtubed to death answer.: next....
my guess is PC is in legacy mode.
so all you need to do is set the boot order to HDD0 first. even turn off all else. and no disks dvd tray
and no USB devices allowed but kbd/mouse, only
then what do you see?, if it still fails, to boot HDD0 them re-seat the 2 cables to HDD 0, and to BLUE SATA jack on most dells, means HDD0 primary port.= blue
then if that fails, turn on UEFI. in BIOS. (if fails turn it off) if wrong this you get F1 , boot fails for sure.
if you reset the BIOS then you messed up UEFI mode, if was used, or the reverse, Ill never tell what is default in any BIOS after all up to ~ 20 revisions and no docs, to see what dell did,but all you do is look in F2.pages.
the BIOS has these key areas, present , missing or set wrong.
UEFI. !!!!
TPM (off is normal , 99% of the time) I call this CIA mode.
fast boot. (turned of forces SAFE MODE, slow boot BUT SURE)
secure boot. !!!! (zero tolerance for wrong)
safe boot. (other media no boot but HDD0 does )
Sata ports disabled. (F2 menus) (really bad of disabled.)
Boot to PXE, disable all PXE entries to off. (mine has 2, on in boot order and one in NIC PXE (disabled)
if any above are missing (not boot order) that means PC is UEFI 0 or 1, or 2.)
resetting BIOS blind or jerking the coin cell before learning how your PC was setup is bad, but not some horror bad. we can fix it, with carefully checking the above. (settings in BIOS)
one trick to boot (1/2 the time) is power on hammer F12, and see all things that can boot and pick one.
like HDD0 ST010132 seagate legacy boot, (a fake ST drive i made up)
or HDD0 ST010132 seagate UEFI boot.
try both one a time, and if one works you learned what works.
r72019
6 Professor
•
5.3K Posts
0
August 27th, 2019 19:00
Just an FYI that a failing or unstable PSU can also trigger random reboots (without a BSOD). This has happened to me with an EVGA PSU. In this scenario, event viewer may likely log critical kernel power issues. The longer you continue using an unstable or failing PSU, the worse it would get. You can troubleshoot by checking output voltages on the rails.
I'm not saying this is your issue, there could be a number of potential causes from what you describe and you'd need to do your own troubleshooting. I'm just mentioning that an unstable PSU could also cause these symptoms. If that is the case, you would definitely want to replace it before it damages your system.
REPLYING TO:
My Alienware X51 R2 had the problem of constantly rebooting that would start at different intervals of time of the computer being on... I am wondering how I can determine if it really is a BIOS settings vs hardware (sata wire?) vs hard drive failure issue. Is there anyone that can help me figure this out?
Alienware-Joe
671 Posts
0
August 28th, 2019 08:00
Thank you for reaching out to us Joe. For cases in which the computer simply goes into the No-bootable-device found, it would be best to reinstall the Operating System if you've already exhausted all options. But we would also recommend getting in touch with our Out of Warranty Team at this phone number: 1 (877) 330-9732