Precision M6700 owner's thread

[SuperMG]

M6700, eDP (to LVDS, RGB-MD).

 

P3000 boots to bios but not to Windows (stock VBIOS)

P5200 worked in LVDS, now doesn't work in eDP?? (VBIOS eDP issues??, modified VBIOS for M6800 laptop)

RTX 3000 works and boots to Windows (HP original VBIOS).

 

I'll test the RTX 4080 and see if it boots, I need to test it fast because not adapted heatsink.

 

Edit: RTX 4080 X-VSION. Works only in HDMI out. Boots to Windows. Didn't work in eDP, despite having the backlight mod cable. 

 

Boots to HDMI out with backlight mod cable and by unplugging the eDP LCD cable.

 

What is wrong then?? The backlight cable mod works in Clevo P570WM3 and Dell precision 7720.

 

It's probably the interposer between the eDP cable and the LVDS display. The GPU didn't like and made the entire computer not post.

Edited 20 hours ago by SuperMG

[Ken]

On 1/1/2026 at 3:01 PM, Ken said:

*** I MAY have figured it out. There are apparently 2 different versions of the E-Port Plus, though specific information is hard to come by. The earlier version, which I believe I have, is only DisplayPort 1. The PRO2X model is DisplayPort 1.2. Once my new E-Port Plus comes in, I'll update this post. ***

The PRO2X model didn't help. I still only get an option for 23/24Hz. I can tell it isn't the cable, because if I use the DisplayPort connector on the side of the laptop, I can get 60Hz at 4k. Unfortunately that defeats the purpose of using the E-Port Plus.

I'm open to suggestions. I'm not adverse to opening the E-Port Plus and modifying it. I'm quite handy with a soldering iron. I've had a Weller iron with a perma-tip for 50+ years. 😊

[DynamiteZerg]

On 1/6/2026 at 6:19 PM, SuperMG said:

M6700, eDP (to LVDS, RGB-MD).

 

P3000 boots to bios but not to Windows (stock VBIOS)

P5200 worked in LVDS, now doesn't work in eDP?? (Got broken??, modified VBIOS for M6800 laptop)

RTX 3000 works and boots to Windows (HP original VBIOS).

 

I'll test the RTX 4080 and see if it boots, I need to test it fast because not adapted heatsink.

 

Edit: RTX 4080 X-VSION. Works only in HDMI out. Boots to Windows. Didn't work in eDP, despite having the backlight mod cable. 

 

Boots to HDMI out with backlight mod cable and by unplugging the eDP LCD cable.

 

What is wrong then?? The backlight cable mod works in Clevo P570WM3 and Dell precision 7720

Can you share the HP original VBIOS for the RTX 3000?

[SuperMG]

49 minutes ago, DynamiteZerg said:

Can you share the HP original VBIOS for the RTX 3000?

These VBIOSes are available on techpowerup.

 

I won't recommend to stick anything HP to it meanwhile because of the heatsink. Some HP cards has a small offset of 0.3cm some don't and that's how I broke mine. 160€ down for nothing. Not getting recognized on my Clevo as well.

 

RGB-MB is the worse option. LVDS will work because HDMI out only uses dGPU so it's full performance. eDP 3D would be great too but it's impossible to get one.