U2414H / U2312HM chained via DP - 14H flashes on & off, 12HM goes to sleep

Set the U2414H back to landscape and then attempt to run the BID (Built-in Diagnostic). Test both monitors in landscape in the Eyefinity group for a single, large desktop.

Thanks for the suggestion, Chris.  I changed both monitors to landscape, etc., but I again was unable to get the 2414 to enter BID mode.  I don't know if it's a button issue or what, but when I pressed buttons 1 and 4 together, one of four things would happen:

1. Nothing.  Often it would take 2-3 attempts before the monitor would register a pressed button.
2. The input selection menu would appear and nothing else would happen, at which point I would have to press the "X" button to close it, which would also usually take 2-3 presses.
3. The input selection menu would appear and the highlight bar would keep scrolling through the selections, as if I had pushed and held only button 1.
4. The input selection menu would appear for a moment, then the screen would go blank.  It was at this point that I thought I succeeded but the self-diagnostic window would then pop up for an instant, shut off, and the input menu would appear again.  If I kept the buttons pressed, it would keep repeating this pattern until I let go.  If I released when the self diagnostic window was visible, it would just stay that way.  If I released when the menu was visible, it would stay that way and I would have to "X" out of it, at which point the diagnostic window appeared again.

Unless there is some other way to get to the BID, I don't think it's going to happen with the 2414.

Get Dell Customer Service for your country to exchange the U2414H.
* Go back to the top of this Monitor Forum
* Open "FAQ Monitor"
* Open "Exchange instructions. No Dell Service Tag number on 24" and smaller? No registration?"

Easier said than done!  First, Chris, thank you for your advice.

I'm posting this follow-up in case it is useful for someone else.  Yesterday I contacted customer service and they couldn't help me without an order number (I bought the monitor from an online retailer, not Dell).  I was transferred to tech support to create one.  After about an hour of that process, I was disconnected, but at least I had a number!  I didn't call back then because I had to leave for work.  Today I called customer service with the newly-created number but was again bumped to tech support because--I was told--they're the ones who process the exchanges.  After getting disconnected once, the guy at tech support said my order number was cancelled.  After verifying the serial and model number, puchase date, retailer, etc. we were finally able to proceed.  I explained the problems I was having with the display and the inability to perform the BID.  Some hold time later, he comes back on the phone to tell me that he can do an exchange but since it was purchased somewhere other than Dell, my brand-new monitor would be exchanged for a refurbished model.  If I wanted a new one, I'd have to go through the company from whom it was purchased.

Buyer beware!

I just took delivery of my replacement U2414H.  I hooked it and my existing U2312HM to my machine (AMD FirePro V3900 with DVI and DP ports / Windows 7 x64) as before with both monitors in landscape position:

Computer V3900 DP --> Dell DP to mDP cable --> U2414H mDP in

U2414H DP out --> BizLink DP to DP cable --> U2312HM DP in

Both monitors came on after login with duplicate desktops.  I changed the setting on 2414 to enable DP1.2.  As soon as I did, the 2312 went blank--into power save mode--and the 2414 began to flicker.  I shut the computer down and restarted.

Both monitors came on with duplicate desktops for ~15 seconds, then the 2312 went black; 2414 stayed on.

Went into settings on 2414 and disabled DP1.2.  2312 came back on.  I went into settings on 2414 and enabled DP1.2.  Both monitors blinked and came on for ~15 seconds, at which point the 2312 went black; 2414 stayed on.

Opened AMD FirePro Control Center and created a 2x1 diplay group.  Both monitors came on showing a single desktop across their full width for ~20 seconds.  2312 went black and 2414 stayed on showing the left half of the desktop.

I shut down the machine and attempted the BID.  This is where I was unsuccessful last time; I couldn't even get to the BID.  Well, after NUMEROUS unsuccessful attempts pressing buttons 1 and 4 (the only thing that happened is the input selection window would show), I finally saw the elusive grey screen!  I pressed button four to scroll through the different color screens as described.  I pressed button 4 to exit and got an image with the words "Dell Diagnostic Test Pattern" repeated in increasing fonts, first in black on white and then in white on black, in the center of the screen.  One more push of button 4 returned me to the self-test screen.

I shut everything down, disconnected the 2312 completely, leaving only the 2414 connected via miniDP to DP, and powered back up.  The login screen flashed on and off; on for an instant and off for several seconds.

I have removed the brand-new 2414 from the system and reverted back to the 2312 as the only monitor, connected DP to DP with the Bizlink cable, with no problems.

Did I just get another bum monitor, has this model been rushed into production before the bugs were worked out, or am I doing something wrong on my end that's creating problems?  Man, this is frustrating!  Any thoughts, Chris?

The card itself supports DP 1.2 and so does the monitor. It has to be something in the AMD Eyefinity software or the driver.

If that's the case, the monitor should run okay by itself, right?  I mean, the old (2312) monitor works perfectly when it's hooked up DP to DP by itself.  If the problem is with the chaining, I would expect the new (2414) monitor to work problem-free when hooked up DP to DP by itself also.  Unfortunately, when I use the 2414 only, the screen blinks off several times a minute, for random lengths of time and at varying intervals.  I made sure to install the driver from the disc that came with the monitor but it still blinks off.  If the problem was with the card or it's driver or software, wouldn't both monitors react the same way?

Anyone know if there is a more recent revision than A00?  I don't see this info on Dell's site.