Palit GTX 970 Jetstream - HDMI works, Displayports give no signal

[LupenWonse]

I have a Palit GTX 970 Jetstream, which is working perfectly when connected through HDMI (well this one has mHDMI and mDPs).
However I can not get a picture out of any of the three mini Display Ports.
I already updated the card bios and drivers and also tried the Nvidia Display Port update.
Does anybody have any suggestions regarding how I can diagnose this card further?
Thanks

[Bozog]

Re: Palit GTX 970 Jetstream - HDMI works, Displayports give no signal

Check for 3v3 at the display ports, the supply to these are protected by something like an apl3516a high side load switch, which can fail.

[LupenWonse]

Re: Palit GTX 970 Jetstream - HDMI works, Displayports give no signal

Thanks for the reply.
I checked the ports. They all have 3.3V.

[Bozog]

Re: Palit GTX 970 Jetstream - HDMI works, Displayports give no signal

Damn, sorry, that's all I had

Had a quick look at a 970 schematic and can't see anything else that looks like it would affect all 3 ports. Not to sound condescending but you're sure your mdp cable/adapter is good?

[LupenWonse]

Re: Palit GTX 970 Jetstream - HDMI works, Displayports give no signal

This is very weird but the problem is now gone.
Didn't do anything, just wanted to check the cable since you mentioned it. Cable was ok. Plugged the card back in, with only DP connected, restarted the computer and boom had a BIOS screen.

I am not sure, maybe it was a driver / BIOS issue that required a reboot to sort itself out. Will try again with HDMI first and then switching to see if that was the problem.

Anyhow, thanks a lot for your help.