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virtuoboy Tutor
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z240 boot issue with dual monitor setup

hp z240 Tower
Microsoft Windows 7 (64-bit)

Issue: Whever the system is booted/rebooted after POST, while transfering control to OS, the system goes into a pause/halt (keyboard and mouse doesn't responds)

Workaround: As soon as one of the monitors is turned off, seems control passes to Windows 7 ("Loading windows" on black screen shows up) and boots normally, now the monitor can be turned on and dual display works as usual

Additional info: While the system is paused, if the NUM/CAPS/SCROLL lock is pressed in a particular sequence (even though the lights actually don't respond), it looks like the key-press sequence gets stored in buffer. This is verfied once one of the monitor is turned off, the same keypress pattern lights up on the keyboard

Setup: z240 with 2x23" monitor connected to Display-ports, HP smartcard keyboard and mouse connected to rear USB. 

BIOS version 1.11 (SP74759)

Has anyone experianced similar issue or anyone has a fix for this?

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fdelbene Tutor
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z240 boot issue with dual monitor setup

Same here.

New Z240 workstation with Xeon E3-1245 v5 and two monitors HP Z24n, both attached on the motherboard's DisplayPorts.

OS: Windows 7 Enterprise x64 Sp1 with latest patches and drivers (including monitors' one), BIOS (01.24)

 

 

I found two workarounds: power down and restart, or briefly attach another DVI monitor.

 

I will try your trick to power off a monitor.

 

 

P.S. Initially I had the same problem using two Samsung LS22A350N monitors and HP DisplayPort->VGA (D-Sub) adapters. I thought it was a problem with the signal conversion and changed monitors.

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Master's Graduate Master's Graduate
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z240 boot issue with dual monitor setup

Make sure you update not only BIOS and drivers, but also firmware, like the Intel ME firmware (sp76976)

I work for HP. However, all opinions and comments are my own.
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fdelbene Tutor
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z240 boot issue with dual monitor setup

I contacted HP support. They said the problem was known and resolved in BIOS 1.27.

I upgraded and it's a few days the user doesn't lament the problem anymore.

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