There are things you can try but not sure if you are willing to go down that route. If I were you I would not venture because this pc is brand new. open up the AIO and remove the cmos battery for 5 min (power off and unplugged from wall).  Then replace battery.  Try F12 and if you can get to boot menu try SA OS recovery.[URL]
New 7700 initial startup, got as far as the pc deciding it needed an update to current win11 version (new computer ?) Told me what it was going to do then started the update  went for a reboot then locked up. All I can get now is the Dell start logo. Can't get into bios pressing f12 Tech help finally understood what was happening & offered me a "swap" or a refund as it was a new machine OK, these things happen but a swap takes "up to 3 weeks" so I now have to wait for a refund It's a shame as it looks like a very nice machine if it would only work   Anybody any ideas while I wait for Dell to get back to me ? Cheers     ps......... it seems my name is "bad"
7700 AIO failed on start up