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HP laptop 2nd monitor flashes on/off. What's up?

I just bought a new HP 2000 notebook computer. I've attached a new Acer 20" monitor as the 2nd monitor. The trouble is, every so often both screens flicker off (go black), then come back on, as if it were about to shutdown, or maybe more like it does when it brings up that dialog asking your permission to run a program. More seriously, it occasionally goes through this blanking thing, but then I see the Acer monitor cycling through it's startup/reset procedure showing the various connector states (VGA, HD, ...), then finally comes back, but both screens are back, all the windows I had opened on the 2nd monitor are move to the primary! This is especially bad when I am connected remotely via Remote Web Connection because I don't have any controls anymore. I used to have an old square 15" LCD monitor connected for the 1st several days I had this HP and I didn't notice any problem.

What do you think? Is this a problem in the Acer monitor? The HP computer? Windows 7? Has anyone ever run into this before?
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jmarkfoley
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jmarkfoley
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3 Solutions
 
nobusCommented:
does it do this without 2nd monitor?
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nobusCommented:
or test with the old one again
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rindiCommented:
Disable screen savers and other powermanagement options that apply to monitors. Also check the OSD settings of the external monitor and disable powersaving features there.
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jmarkfoleyAuthor Commented:
OK - I will try all of the above and get back.

Rindi: what are OSD settings and where can I find them?
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rindiCommented:
Most monitors have an "On Screen Display" which you can access via the monitor's front panel buttons. There you can usually adjust it's settings. You'll have to check the manual of that particular monitor for details, or just try the buttons you have.
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jmarkfoleyAuthor Commented:
First test: removing Acer and re-installing old CTX monitor. I've had the connected for several hours now and not a single flash. I'll reconnect the new Acer and check OSD settings. I did play around with the OSD buttons for about 1/2 an hour when I first conncted the monitor. These are the most extrordinarily poorly labeled button's I've seen on a monitor, surprising for Acer. After 1/2 an hour I couldn't even figure out how to change the brightness even though I was on the brightness display numerous times. I'll give all that another shot to make sure I don't have power saver features at work. Stay tooned.
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CallandorCommented:
It sounds like the monitor is the problem here, since your old one doesn't have the problem.  Acer is a cheap manufacturer and doesn't have the highest quality products.
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nobusCommented:
yes it looks like a monitor problem - you can test it on another PC, to see if happens then also, to confirm it
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jmarkfoleyAuthor Commented:
I've re-installed the Acer on the HP laptop. I've managed to figure out how to operate the On Screen Display setup. However, the CD that comes with the monitor really doesn't say anything about what some of the settings are. Again, disappointing. I had an Acer laptop that ran like a champ for 6 years and I was impressed with it's quality, but this monitor is a let down. Anyway, there are some settings that might have something to do with this problem. Perhaps someone can offer some suggestons: These acrynoms are not interpreted in the manual.

DDC/CI - Whatever this is, it is currently set to ON and can be either on or off. What is it?
ACM - This is currently OFF and can be on or off. What is it>
Clock - This is set to 51, presumably out of 100. What is it?

The display is set to 1500x900. Horizontal scan is 60KHz, Vertical: 60KHz. These don't appear changeable.

I've search for HP and WIN7 video driver updates, but I have the latest.

I will try setting the monitor up on another computer tomorrow and see if that makes any difference.
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nobusCommented:
ddc/CI   http://en.wikipedia.org/wiki/Display_Data_Channel
explanation :  http://answers.yahoo.com/question/index?qid=20081005134251AAs6hid

ACM automatic contrast management : see : http://www.youtube.com/watch?v=po3ma4M_WRQ
 with the overdrive switched to OFF, the Automatic Contrast Management (ACM) will turn on (even if the OSD shows it off) everytime turning off/on the monitor.
To go back to the contrast/light presets, you need to enter the menu everytime.

When the ACM is turned on, the display is very bright (you can't see it very well because the camera auto adjust the exposition itself)

clock - can it be this :  LCD Clock is a simple digital clock for your desktop....
see : http://www.giveawayoftheday.com/acer+lcd+monitor+x263w/
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CallandorCommented:
Clock is probably the refresh rate (cycles per second) - for LCDs, it doesn't make any difference.  CRTs needed a higher rate to avoid eye fatigue and interference from fluorescent lights.
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jmarkfoleyAuthor Commented:
Final testing and my solution: I switch both a CTX and VIZIO monitor to this HP 2000 laptop, no problem. I put the troublesome Acer monitor on my old laptop, no problem either! So, I only have a problem with the Acer monitor connected to the HP 2000 laptop. All other combinations of monitors and laptops work OK. Solution: Yesterday I returned the Acer monitor and bought a Tatung (not a household name, to be sure). I've been running it for hours now now on the HP 2000 with no problem. Additional advantages of the tatung are an easier to use OSD control panel and exact resolution mapping to the HP 2000 (1366 x 768). The Acer was 1300 x 768 which resulted in scroll bars when I used remote web connection into other computers ('tho I could have changed the HP to 1300 x 768). So, solution: Replace the Acer!
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jmarkfoleyAuthor Commented:
Thanks to all for helping me work this through
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nobusCommented:
tx for feedback
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