U2414H, does not detect computer, power save mode

Question

Hi everyone, Recently I acquired a Dell U2414H monitor. I connected with my computer through mini displayport cable that is included in the package (mDP to the monitor and DP to GTX 970 port). First time I tried the monitor, it showed nothing. Then I disconnected the cable from both, monitor and computer, and reconnected again. It worked. Yesterday, however, it didn't work. I turned on the computer but the monitor the Power Save Mode showed up. I restarted the computer but this message appeared on the screen: 'There is no signal coming from your computer. Press any key on the keyboard or move the mouse to wake it up. If there is no display, press the monitor button now to select the correct input source on the On-Screen-Display menu.'  when I selected mDP option. I restarted the computer several times, but every time appeared one of those messages. I searched for answers on this forum and found this thread. I followed the steps posted by DELL-Chris M and then when i turned my computer on, it worked out at first. I turned off my computer, and one minute later when i turned it on again, the monitor showed the Power Save Mode message again. Since then, every time i restart my computer, the monitor does not detect it. Could you make any suggestions about this problem? Thanks and sorry for my English, it's not my mother tongue.

DELL-Chris M · Answer

Does the monitor pass its BID (Built-in Diagnostics)?What is the 20 digit serial number and revision?Was it purchased directly from Dell?

Alain On · Answer

I'd want to add that the monitor works almost randomly. Today it worked at first, i restarted my computer 3 times and it worked. Then at the fourth time, the Power Save Mode message appeared again.

Alain On · Answer

Yes, the monitor passed its BID (RGB screens, black, white and the one with text). Serial number: CN-09TG46-74261-5AJ-DR1S Revision: REV A03 Purchased from Amazon

DELL-Chris M · Answer

Manufactured on January 19, 2015. So 14 1/2 months old. Did amazon sell this as new or used? Did you test by disabling DP 1.2 in the monitor OSD (On Screen Display)?

Alain On · Answer

Yes, I ran the test with DP 1.2 enabled. And the product was sold as new by Amazon.

DELL-Chris M · Answer

I wrote, 'Did you test by disabling DP 1.2'.  I would not accept a new product that was 14 months old. If me, I would return it to amazon for refund. Then buy a new one directly from Dell.

Alain On · Answer

I tried both, by enabling and disabling DP 1.2 anyway.

As It seems the problem is generic with U2414H monitor and its DisplayPort, i don't think that could be a solution. Will you create a driver or something for this problem in the future?

DELL-Chris M · Answer

I have no idea what could happen in the future.

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