Mikrotik rb 750gl rebeeot

Asslam-o-alaikum
I Have an issue with my Mikrotik router rb750gl it is restarting automatically after few seconds. And Any Thing Is Not Working So What Can I Do?
Before Sometime I Have Upgraded My Router OS v6.38.2. Now I Have This Issue Please Help Me.

Thanks In Adwance



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Something goes wrong
Use Netinstall (use wiki for that) with RouterOS 6.40.7 for format and reinstall the software (select “keep previous configuration” on netinstall before install!!!)