My Volvo 70xs will not start and in the display panel it tells me "Immobiliser check manual" but it offers me no solutions...please help

Looks like a reboot is needed. If you have a manual, you can see how to reset. Download if needed.

Check battery voltage (engine off= 12V; engine on=14.4V), then check fuses, then connect with Volvo diagnostic tool and check for error codes.

Try locking and opening the doors it should reset this way. If not look at the fuzes under the glove box. If this all fails get it diagnosed at a Garrage.

Get a scanner from IPD and that will tell you what is wrong as well as give you the ability to clear any codes.
Foxwell NT 300 Diagnostic Scan Tool

I heard you can hit the unlock button onyour key to sometimes to reset this. It is most likely under the dash or behind the side panel on the passenger side. This the the wll where the pasengers feet will hit, and there may be a access hole to pop out. I hope this helps.

If there is a blinking car icon with an "X" over it. This icon means the Immobilizer has been activated and hence won't allow the car to start. It could be due to a bad SCU, Start Control Unit. The SCU is actually the ignition switch on these cars.
Most of the time it's triggered by the anti-theft system..You can try this trick i learned that the dealers won't tell you...try locking and unlocking of the doors five times with the remote to reset the immobilizer and see if this helps.
Since you were in an accident it could be a safety related issue...such as a steering box fault. Your owners manual has some information in it on the immoblizer.
Good luck..i hope this helps...please take time to rate me a fixya,

chances are the key(S) need reprogramming.try diconnetting the battery for 5 mins to rest

is that factory alarm,you can try to lock and unlock the driver side door.if not usually they put areset button under the driver kick panel,or u can bypass it by tapping the yellow wire on the ignition swicth,wiring side,