Hi Les. Welcome to justanswer.
Which device are you using?
Once you click this link below(CLICK HERE)A file will automatically get downloaded. Check your download section, a file named ELSINORE.SCREENCONNECT will be present. Just open that file so that I can connect to your computer.
You need to click this blue text above and then open the file which gets downloaded.
You need to open this link from your computer/laptop
Have you tried changing the mains plug and tried connecting to a different power port
Click this link and press I Agree and open the file which gets download.
When you connect the HP charger to the system, does the led light glows on the charger?
Is the system turning on?
How old is your HP?
The battery has reached the end of its life. It is not able to hold the charge anymore. You will need to replace it with a new one
A new battery will cost you around £12-20
You can buy the new battery from this link.
CLICK HERE TO BUY
Let me know if you need any help.