iPad 2 Booting Problems

[Someone...]

Hello, I have an iPad 2 that I bought when it got released... So it's been years I had this device, it used to run with no problems only lags a little bit now whenever I unlock it it starts fine but two mins later it crashes and reboots it might turn on again and do the same or show up a black screen I get it out of this by force restarting it but it might get stuck on a black grey screen or gets on the Apple logo or keeps crashing while rebooting. Once it showed a double panic debugger while rebooting... I always have to wait for the battery to drain if it doesn't force restart or gets stuck on one of these conditions help me please!

 

[bufffilm]

What iOS version is this?

 

[Someone...]

9.3.1

 

[bufffilm]

Can you boot to dfu mode? If so, just restore the iOS ...it will install 9.3.5