Insipiron 7720 now won't work properly unless the charger is plugged in.
When booting without the charger, it BSODs very early in the boot sequence with SYSTEM_THREAD_EXCEPTION_NOT_HANDLED - What failed: iaStorAC.sys
When we plug it in it boots fine.
When running (Windows 10) if you remove the plug everything freezes.
Based on the iaStorAC.sys message, I have installed the latest Intel Smart Storage drivers but it's not helped.
Maybe of relevance, but not sure how - the original Dell battery no longer charges (error message in Windows), so we replaced it a number of months ago, but it was working OK for a number of months and has only just failing.
Also, the laptop is saying it doesn't recognise the charger, even though it's the original Dell one.
I'm looking for ideas what's wrong and how to fix it
Charger issue 1-2-3
1. Try another Dell OEM adapter. If it's not recognized either,
2. Replace the DC jack:
If that doesn't get the adapter recognized, the charge circuit on the mainboard is bad. It's up to you whether a mainboard replacement is worth the cost; on an 8-year old system, my assessment would be that it is not.
3. If it is worth the repair, the mainboard replacement will be at least a couple of hundred dollars (assuming normal shop labor rates).
For the storage issue, run an extended (several hour) test on the hard drive. If it's original to the system, it's about three years beyond its design life and may have developed bad sectors. F12 at powerup - do the selective tests and include a hard drive surface scan.