Run the Dell diagnostics to check all the hardware. The gpu probably failed. Use the integrated video until you can buy a new laptop. It might be hard finding a replacement card for a 7 yr old laptop. But if you want to try-- the service manual is here.

I have figured out that before this happened i used the harddisk of this laptop on another old dell laptop to boot and test the hardware

so i thought maybe because of uncompatible drivers on that device this happened
could this be the case?

My m4800 is doing the same thing - was already thinking of upgrading video so went to eBay and ordered an m1200 4GB card.  Hoping to receive and install by Christmas

Hope that works for you

let me know if your problem solved

have you try to disassembly your laptop? maybe something loosen or disconnected

So the new one works but.....only after rolling back Windows November Update.  Then I reinstalled the Intel drivers.  To be honest, I think the k2100m was fine.  Still trying to get this new config working with Directx

Yes

i have reseated the gpu and cleaned the mxm slot with contact cleaner spray

but with no results 

I have the same problem on my M4700. nobody helps...when I figure this out, I swear I will never ever buy Dell laptops...the BitLocker also erased everything from my hard disk...

Also happened to me on my M4700 Extreme version. Looks like Windows 10 update caused it, since there was no problem on Win7 Pro. Not a hardware fault imo.

Solution to any GPU graphics card

1. Remove your GPU card and clean it with mentholated Spirit or dry gin ethanol, with a small brush or cotton wool and make sure nobe is attached to the card

2. Use the mentholated Spirit or dry gin ethanol to clean the pci port or connector of the GPU card slot, by using the mentholated Spirit or dry gin ethanol to wipe the slot

3. Also use the  mentholated Spirit or dry gin ethanol to wipe the surrounding and the other port

4. Clean off the old or dry paste on the GPU and replace with new  cooling paste.

5. Blow and clean andy dust on and ind the heat zinc and brush the cooling fan off dust

6. Let it dry for an hour or use blower to dry it off 

7. Note: sometimes when laptop or system is hitted by heavy or hard object or if it falls on the ground heavily, a slight shake can affect GPU card, so make such to tighten up screw properly to fix slight shift.