|If you know someone who has more computer knowledge who may be willing to help you, get them to help you !|
Take this netbook to a local repair place and have them fix your problem - it's probably easily fixed if there's nothing wrong with your netbook itself or the hard drive itself.
"Netbook" and "HP Mini " isn't specific enough.
Scroll down a bit.
Look for the similar label on the outside of your computer.
Quote the specific model number - that's at the end of the first line.
Quote the Product number - that's on the third line.
Since it last worked properly, have you, or is it possible anyone else who has had physical access to this Netbook
- dropped it, or otherwise subjected it to a physical jolt ?
- spilled liquid on it, or exposed it to liquid such as rain, or sprayed it with liquid ?
Has there been a power failure event, or lightning strikes in your region, since it last worked properly, while the AC adapter was plugged in ?
Any of those things is a lot more likely to cause damage to your computer that requires that something inside of it must be replaced.
Does your netbook model have a built in optical (DVD) drive ?
If NO, do you have, or can you borrow, a USB connected optical drive ?
Was there "A recent hardware or software change..." just before this first happened ?
If yes, what was it ?
Try connecting an external monitor. to see if you get video rather than blackness when you try the Windows loading choices.
If your symptoms don't change, then continue on with the rest of this text.
Laptop no video (or video problems), and battery, AC adapter, power jack T shooting.
See response 1:
Some laptops will display on an external monitor without you having to do anything. Other laptops require that you press a key combo to toggle the display to external display / built in display - see the Owner's or User's manual for your specific model.
If there's nothing else wrong, you should test your hard drive, and if it passes, you're going to need a suitable Windows CD or DVD that you can boot the computer with, or you need to connect your drive to another computer, to possibly fix your problem. (I'm assuming you have Windows on the computer.) If there's nothing wrong with the hard drive itself, usually the problem is easily fixed.
Test your hard drive with hard drive manufacturer's diagnostics.
Seagate's SeaTools will test (almost) any brand of hard drive.
Do the long test.
The Dos bootable versions of SeaTools can test the hard drive when Windows will not load properly, or even when the drive has no data on it.
It the drive itself passes the test, any data problems on the drive can be fixed one way or another.
(You'll need to make a SeaTools CD on another computer in order to test your hard drive.
This is in the above Seagate info....
How to burn an .iso image onto a CD 
E.g - use
Alex Feinman's ISO Recorder (Freeware) )
It the drive itself passes the test...
- you're going to need a suitable Windows CD or DVD that you can boot the computer with to possibly fix your problem.
NOTE that if the CD is an XP CD, it probably WILL NOT load from a USB optical drive, unless it's a really OLD model A Vista or Windows 7 DVD will load fine, but you can only do certain things with those operating systems on a drive that has XP on it. If an XP CD will not load, a better alternative is to make yourself a bootable Linux CD and use that to boot the computer with, and run something similar to CHKDSK /R (see below) on your drive in Linux, or try one the the alternatives (see next).
If your netbook has a built in optical drive, an XP CD will load fine.
After the initial files have loaded, press R to load the Recovery Console.
Type the number of the Windows installation, then press Enter (usually that's
press 1, then Enter)
(If it finds no Windows installation, you have a SATA hard drive.
Using an XP CD and SATA drive controllers, SATA drives; the SATA drive controller bios settings.
See response 2:
When you see...Password, press Enter.
The first thing to try is
Type CHDSK /R (the drive letter of the Windows Installation) followed by a colon. Usually that's CHKDSK /R C: (press Enter)
There is a space between CHKDSK and /R, and between /R and C:
When it has finished, type: exit (press Enter) to close the Recovery Console and restart the computer. DO NOT press the key to boot from the CD. Let the computer attempt to boot and load Windows normally.
- an alternative that MIGHT work is to
- remove your hard drive
- if it's a SATA drive, connect it internally to a desktop computer's SATA data header and SATA power connector that has a working Windows 2000 or up operating system on it, , then run CHKDSK /R on your drive.
(Laptop / netbook (2.5") hard drives have SATA data and power sockets that are identical to those on desktop (3.5") SATA drives.)
- if it's an IDE drive, install in in an external drive enclosure and connect that via a USB connection to any computer that has a working Windows 2000 or up operating system on it, then run CHKDSK /R on your drive
Or use an inexpensive laptop IDE to desktop IDE data/ power adapter to connect it to an IDE data cable and power connector on a desktop computer internally
(Laptop / netbook (2.5") IDE drives have more pins on the one header and two of them are for 5v power - the header is physically smaller than the data header on desktop (3.5") IDE drives, which have a separate power socket.)
Or use some other type of inexpensive adapter to connect it via USB to any computer.
(Just running CHKDSK /R may fix the problem).
E.g. the drive letter(s) of your hard drive will be different on the other computer. Most original hard drives on brand name computers have two hard drive partitions, the larger one is C on your own computer. The smaller partition on your hard drive may or may not show up on the other computer.
The drive letter(s) for your hard drive on the other computer will probably be the highest drive letter(s) alphabetically.
In XP, Start - Run - type: cmd (click on OK or press Enter)
Type: CHKDSK /R (the drive letter of your hard drive, or the first of two drive letters for your hard drive) and a colon character (press Enter)
e.g. if your hard drive partition is seen as H in My Computer.
Type CHKDSK /R H: (press Enter)
There is a space between CHKDSK and /R, and between /R and H:
When CHKDSK has finished, close the black CMD window, or type: exit (press Enter) to close it.
Install the drive in your computer and try booting the computer.