Bonner

22 minutes ago, pinkyfloo said:

to me sounds like a cable failure, a conflicting BIOS variable, or, in my case I experienced AMD driver problems (W10) that made that and forced me into safe mode to DDU and try to fix it, they were conflicting for a while, when you press Power on you should see the Dell logo, probably a RAID, then back to Dell logo with W10 Loading circles below, then Black, then Windows, if you don't see this on the laptop with no external monitor most likely is a Hardware failure, as you say, probably the cable, when I had the driver problem this still shown up but when it was BIOS conflicting variables it didn't do anything, not even backlight, at least for me, if you want you can try to remove the CMOS battery it'll reset the BIOS to factory settings including all hidden variables (PWR off, unplug, remove batt, press PWR 10 sec, remove CMOS 1 min, place everything back and turn on, you might need to change your boot mode to UEFI and SATA mode to AHCI after this) 

Thanks for the quick response! So, I attempted resetting the BIOS to factory settings per your instructions, still no output on the display whatsoever. I'm definitely leaning towards a cable failure.

Hey guys, I recently purchased a 07KGN Rev. 1.0 motherboard with the dGPU and beefier heatsink. I installed it into my E6440, but my display isn't receiving any output. I currently have the 1366x768 panel. It doesn't seem like a backlight issue because my screen just stays fully black, there's no dim imprint or anything. I did plug it into an external monitor via the VGA port, and it works fine. The BIOS (revision A23) didn't recognize it has a dGPU, it just said integrated graphics. However, when I booted into Linux, it recognized that I have the AMD dGPU installed and I could download drivers for it. I personally think it's a problem with the display cable. Anybody got any idea what's up?