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197 posts

Master Geek
+1 received by user: 21


Topic # 139168 30-Jan-2014 09:05 Send private message quote this post

Hi Team,

I have 2 clients with newish i5 ProDesk 600 machines, both with DisplayPort to VGA adapters from CDL to drive a second screen.  Once or twice a week the LCD connected to the onboard VGA goes blank/black.  If I VNC in, the 'display' on that screen is still operational, so I can save/close any work the user has on that screen.  If the machine is rebooted or monitor is disconnected and reconnected (you hear Windows detecting this) and the screen lights up again.  Drivers are up to date (as per the HP web site versions).

As these machines have dual DisplayPort plus the onboard VGA, I'm going to try driving both LCDs from the two DisplayPort connectors and abandon the onboard VGA.

Just wondering if anyone has seen similar behaviour or has any other relevant thoughts on possible causes/fixes.

Cheers
Mike

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gzt

3737 posts

Uber Geek
+1 received by user: 104

Subscriber

  Reply # 977139 30-Jan-2014 10:23 Send private message quote this post

Hi Mike, No clue really but here are some random thoughts. A while back Apple had a strange DP to VGA adaptor issue which required a bios update to resolve. Might pay to check the latest bios. Also I would consider using the official HP adaptors here. Also is there a device option to disable power management for that device? Maybe they are just not handing an occasional power event through the adaptors. Good luck!

6095 posts

Uber Geek
+1 received by user: 383

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  Reply # 977158 30-Jan-2014 10:47 Send private message quote this post

Yah I would do a BIOS and drivers update. I haven't seen the issue though and we have quite a few of these in the market already.



197 posts

Master Geek
+1 received by user: 21


  Reply # 977535 30-Jan-2014 16:31 Send private message quote this post

PP's machine had current BIOS and a recent display driver with a 3rd party DisplayPort to VGA adapter.  I updated the display driver and switched to an HP DisplayPort to DVI adapter, as one of the monitors had dual input options.

PR's machine had the current video driver and an old BIOS, with an HP DisplayPort to VGA adapter (no digital connections on the monitors).  Updated the BIOS (the readme did indicate a video bug was fixed).  Crossed fingers.

142 posts

Master Geek


  Reply # 977564 30-Jan-2014 17:20 Send private message quote this post

I have had odd issues driving dual display from HP 6300 desktop - Previous Generation to 600 G1

Decided that for price of cheap dual display video cards $40, that this was better (reliable) solution



197 posts

Master Geek
+1 received by user: 21


  Reply # 977566 30-Jan-2014 17:24 Send private message quote this post

Hmmmm OK.  We had no issues with dual displays on the 6300 Pro series, and have maybe 2 dozen deployed with dual screens.

These troublesome two are the first we've deployed with DisplayPort to VGA adapters - before now it has always been DisplayPort to DVI.



197 posts

Master Geek
+1 received by user: 21


  Reply # 978195 31-Jan-2014 16:01 Send private message quote this post

PR's machine has had the fault reoccur while he was in the middle of working on a document (so it is not sleep related).  I'm really brassed off, and the client is losing patience.  I'm ordering a low profile dual head card and will hit up HP a bit harder for a solution at the same time.

891 posts

Ultimate Geek
+1 received by user: 21


  Reply # 980215 4-Feb-2014 16:48 Send private message quote this post

I have installed 3 of these recently and havent seen any issues at all with the DP screen nor the onboard connected screen.

Since they are a business computer, get HP involved and work through their warranty system. You can get them to change parts out.



197 posts

Master Geek
+1 received by user: 21


  Reply # 980519 5-Feb-2014 09:19 Send private message quote this post

The two machines affected are at a top professional firm and they have little tolerance for hassles.

PP's displays are stable now we are using an HP DisplayPort to DVI adapter.  We have many machines with this configuration and none have given any display trouble.  We did have one with a dodgy onboard network adapter but a motherboard replacement sorted that.

PR's machine with the HP DisplayPort to VGA adapter (AS615AA) continued to give trouble.  We had a low profile dual head video card lying around (an HP branded Quadro NVS295) so we put this into the machine with a DMS59 to dual VGA cable to knock the issue on the head.

The two machines above were supplied 4 months apart, but we only recently put a second screen on PP's machine triggering the issue.  The first DisplayPort to VGA adapter we used was a 3rd party one, so I don't think the adapters are the issue - motherboard design or driver issue perhaps.

Next time we have an order for a ProDesk 600 with a bit of lead time I'll set it up on my desk and try to break it.

699 posts

Ultimate Geek
+1 received by user: 31


  Reply # 982614 9-Feb-2014 11:51 Send private message quote this post

We have just deployed some of these at work. The standard drivers that came in the driver pack are working fine. We use DP to DVI adapters which require no drivers and the vga out. Never had this issue. http://www.dove.co.nz/products/cables-adapters-brackets-and-stands/adapters/9097.

2 posts

Wannabe Geek


  Reply # 1014933 29-Mar-2014 01:33 Send private message quote this post

Good morning all,
I have scoured the internet for this specific issue, and I cannot find the answer anywhere.  I am tearing my hair out at this one.  In January of 2014, my company purchased 32 HP ProDesk 600s SFF for a computer lab.  Within 3 weeks, 7 of the ProDesks had failed power supplies.  Due to the fact that there was a shortage at HP's warehouses, it took an extra 4 weeks to get the parts.  Now that they are finally up and running, the screens go blank at random times.  It is never the same two desktops that "go blank" but every morning when I come in, two different desktops have blank screens and rebooting them (aka holding down the power button) is the only way to fix it.  The problem goes away for the rest of the day after that.

I have updated the BIOS to the 3/25/14 version, I have updated the Intel video drivers to the latest version, and they still go blank.  We are running Win7 Enterprise 32-bit, fully updated, and I am just running VGA from the onboard Intel video card.  Very basic setup.

If anyone has any other ideas please let me know.  All HP has on their website are the generic "Is the monitor plugged in?" "Is the VGA cable bad?"  tier 1 trash that doesn't help anyone.  I REALLY do not want to think that I have 32 dead motherboards on my hands!  I would demand my money back!

Thanks,
Jimbo

2 posts

Wannabe Geek


  Reply # 1016304 1-Apr-2014 03:13 Send private message quote this post

*****QUICK UPDATE*****

After scouring the internet, I decided to try the display adapter drivers from Intel's website; the drivers were released 3-11-14.  After pushing the driver to all 32 of my desktops, it **SEEMS** to have solved the "black screen" issue.  (It even mentions the black screen issue in the Readme.txt file)  I will let everyone know in a few weeks if this has indeed fixed the issue permanently.

Jimbo



197 posts

Master Geek
+1 received by user: 21


  Reply # 1016321 1-Apr-2014 08:34 Send private message quote this post

Fantastic tip thank you Jimmy.  I'll roll that version out to our troublesome clients today.

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