|"I connected the laptop to my desktop monitor and got the same display."|
If you mean it does this in both cases...
"...the Windows logo appeared, but afterward the screen went black and I can not see the desktop."
AND you always get video while booting up until that point...
If you are having display driver problems, sometimes you will get no video after Windows starts to load.
Try booting into Enable VGA mode.
Repeatedly press F8 while booting, and when the boot choices menu appears, select Enable VGA mode.
Enable VGA mode loads everything normal mode does, except it forces Windows to use default VGA drivers that all mboards and video adapters support, rather than any specific drivers you loaded for your video adapter.
If that gets you to the desktop eventually (Windows will want to run chkdsk because you didn't shut down Windows normally - don't cancel that - let it do it), then
go to Control Panel - Display - Settings
- If it doesn't say Plug and Play Monitor, or the specific drivers for your monitor, there, click on the Advanced button, Monitor, Properties, Driver, Update Driver, No, not at this time, Next; Installfrom a list..., Next; Don't search..., Next; Select Plug and Play Monitor, Next, etc.
- If it DOES say Plug and Play Monitor, or the specific drivers for your monitor, there,
skip the next step, go to (HERE) below that.
Reboot the computer, normally.
You should have video in Windows.
- If you don't have video in Windows at that point, start up the computer in Enable VGA mode again, and
(HERE)- un-install any display drivers listed in Control Panel - Add/Remove Programs, (don't reboot at that point) and go to Device Manager (e.g. RIGHT click on My Computer - Properties - Hardware - Device Manager), Open up the Display adapters entry, RIGHT click on the name of the display adapter, and Un-install it.
Reboot the computer, normally.
You should have video in Windows but it may be very crude.
Go to the HP web site, look for the drivers for your Presario model, and download the display drivers, and install them.
If you have no video in Windows, to shut down Windows normally.....
when the hard drive has finished blinking it's led,
hold down Alt and Ctrl, press Del, let go of the keys; hold down Alt, press u, let go of the keys; press u
"How easy is it to remove the drive?"
Try what I suggested (VGA mode) first.
Most Presario models have a Maintenance manual you can download - how to remove the hard drive is in that - search for it on the HP web site.
"The desktop monitor is now displaying a message that says there's no input or that the cable is disconnected even though the monitor cable is connected. What could this indicate?"
Some monitors display a message like that if they are getting no signal or if the monitor is unplugged from the computer - that message is not generated by the computer itself.
Most more recent laptops will not start up if only the AC adapter is plugged in - the main battery must be installed as well, and it must be at least minimally charged. If the battery is not charged up enough, the laptop will not start up until it has been charged to at least a minimal level.
How old is the main battery? If it's more than two years old it cannot be charged to it's full capacity.
Are you sure the AC adapter is okay?
On a friend's Presario, there is an "charging" led on the left front of the laptop that lights up when the AC adapter is plugged in and the computer is receiving it's power and it's charging the battery. Even if the main battery is fully charged, if you unplug the AC adapter then plug it back in, that led should come on at least briefly.
If that led does not come on at all, there is a problem with the AC adapter or it's connection to the laptop.
You are supposed to pull on the plug at the laptop when you unplug the AC adapter - if you pull on the cord instead, as many people do, eventually the plug or the wiring at the plug will be damaged, and after a longer time, the jack in the laptop the plug plugs into can be damaged.