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Windows 7: HP LP2475w not recognized

02 Mar 2010   #1

7 pro 64 bit
 
 
HP LP2475w not recognized

I'm having a few issues on getting a replacement monitor for one I've had to return with quality issues, to display at its full native resolution, it defaults to 1024 x 768. I was however able to display this first monitor in its native resolution of 1900 x 1200 at 60 Hertz

Following unpacking the monitor I connected the replacement HP LP2475w monitor to my PC using the same connections as the original (PC switched off at the time and power off at the socket as well). DVI into port 1 and into port 1 on the Graphics card. No green lines this time, so solved that issue.

However this replacement defaulted to a screen resolution of 1024 x 768 at 60 hertz, and on the screen resolution page within the control panel, had no options above 1280- x 720, certainly not the native screen size (1900 x 1200). Initially it displayed on the screen resolution as Generic PnP Monitor.

Tried the detect monitors with no effect.

Opening the HP Display assistant the adjust, wizard and file menus are greyed out. Selecting update tells me the driver is up to date. On display windows top bar the device displays as 1 - (00000000).

I uninstalled and reinstalled HP assistant with no improvement. Restarting the PC at each stage.

I exited the HP assistant and restarted the application as recommended it the HP troubleshooting guide, and then repeated it restarting the PC after exiting the application. No change either time.

I downloaded and tried to install the Windows 7 Pro 64 bit driver from the HP Support site. It downloaded without problem, but failed to install correctly. No error messages, just windows bring up a dialogue box asking if the driver installed correctly. Repeated the install selecting Yes the first time and no the second. Nothing different to the best of my knowledge. Restarting the PC at each stage.

Following that I manually installed the .INF and .ICM files.

Hardware devices > Monitors and Control Panel > Display Settings > Screen resolution >Advanced settings > monitor now displays the HP LP2475w correctly. Selecting driver update says the latest version is installed (16/06/2009 version 2.0.0.0).

Returning to Control Panel > Display Settings > Screen resolution, the display now shows Display 'Device on DVI', but still doesn't recognise the monitor.

The Nvidia control page just shows digital display. If I look at the add resolutions under Nvidia control page > Display > Change resolution > Add resolutions the highest option available is 1920x1080. Adding the checkboxes 8/16bit and add displays not exposed by the display made no difference to the list of formats available.

The graphics card is HDCP capable

I tried an HDMI cable and the dvi-2 (same PC port), same results.

I went back to the first monitor with the quality issues using the same connections as when I set it up after it arrived, and the same settings as I used for the replacement, and it displayed first time from the Windows boot screen onwards in 1900x1200 with no other settings changed. Went back to the replacement again and no change - still 1024 x 768

I tried connecting the replacement HP to my laptop (Vista 32bit with NiVidia GeForce 9300M GS), and that would display upto 1600x1200 (imagine if the card was compatible full resolution would have been fine).

I've run out of ideas. please can you advise how I can enable the 1900 x 1200 resolution on the monitor?
- Is there something on the PC blocking a second HP LP2475W to have been plugged into the new PC (arrived the same day as the original monitor, preinstalled with Windows 7 Pro 64 bit), when the original displayed the native resolution without issue?
- Do I have another defective monitor which doesn't display the native resolution?
- Is this a problem with the registry settings?
- Perhaps its a problem with the HP display assistant software?

Thanks in advance for your help.

best regards,

Steve

My System SpecsSystem Spec
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 HP LP2475w not recognized





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