I have a HP L1706 17" monitor that was given to me. I do not have a manual for it. I am building a computer from scratch with my nephew as a project and we have been having a problem getting the BIOS to load. The monitor was just showing a blank, black screen. I pressed the ' ' button for a few seconds and now the monitor just keeps changing colour- red, blue, red, etc., over and over and I cannot get it to stop. Can you help please? Teresa

There can several reasons for your monitor black screen issue. To help you troubleshoot the issue, please find the link given below and follow step-by-step instructions mentioned on it:
http://support.hp.com/us-en/document/bph04760

If issue persists, it is recommended to contact 'HP Support Center' for further assistance from the link given below:
http://www8.hp.com/in/en/contact-hp/contact.html

GuruAid.com

If monitor is fine, and cables too, then is a problem with VGA. If the VGA you're using is build in MB, then it might be that. Try to use a VGA card or another VGA card.

There are screen cleaners which are available at all laptop/PC spares which can be used to clean and wipe out the scraches,. However if the scratches are deep into the LCD then it cannot be undone and you may need to change the LCD if the vision is too blurred.

To disable sleep mode in vista follow the steps

Go to start and type in the search box Power Options hit the enter button
On the Left side there is a panel Click Change when the computer sleeps
Click the drop-down box which says Put the computer to sleep and select Never
Click Save changes

VGA no signal means "no signal" from the computer on the VGA (blue plug) cable... ...if the computer works check the cord for loose connection or get a new cord...if the computer is hooked to the digital cable (DVI/white plug)...set the signal source on the monitor to digital...

the PC never turns off power to the monitor, it has its own power.
and sure, the monitors all do that 2004 to now. called VISA sleep.
modem has nothing to do with this.


Some monitors have this features called that.
its in your users manual. 2009m?
your page.
https://support.hp.com/us-en/product/hp-value-20-inch-displays/7274733/model/3884700/manuals

the words are clear.
it has power saver mode, turn that off
it has osd LOCK,
but no powerlock. as some do,. as your manual. shows.

page 24 shows.

http://h10032.www1.hp.com/ctg/Manual/c01725831

quote, power button does this.
turns the monitor on and to standby or sleep mode.NOTE:
The power button is located on the top or front of the monitor depending on the model
off , on, and sleep.
my guess you are putting the power button i Sleep mode
a feature of this monitor.

newegg.com is a fantastic site, i have built several pc's and i always use them, they have everything you will need

you cant you will have to buy a new screen or buy some gel for it that might work

please rate my help to you.
thank you

your monitor need to hardware reapair that is inverter and lamps or PWM power something wrong, you can not keep use that will become complex damage in hardware. it is not too hard to repair, you may find a computer company to fix it, please tell me where are you live.

whats your graphics card model and what kind of power supply you have?