Will not power back up.

Hi
The waste ink are in the inside of your printer you need to get at it to clean out, but after this you got to reset it after you cleaned it or it will still not work, you may not have to get inside to clean it try this first to reset it.
Reset CANON PIXMA IP5000 printer To reset the counter or to find out about it’s reading you have to use the service mode.
Turn off the printer, push the resume button and keep on pushing.
Press the power button and keep on pushing. Now let go off the resume button,
but not the power button. Push the resume button twice, then let go off all buttons.
You are now in service mode.

To leave the service mode, give the power button one push.

Push the resume buttons once, after that the power button once.
The first information page appears.
Push resume twice, then power once: You get the second page.

Newer PIXMA-printers print the first page as a test for the nozzles.
The second page contains a lot of information.

Our advice: Print the second page before and after reset of the waste ink counter.
Only then can you be sure that the reset was a success.

To reset the waste ink counter right now, push resume four times and after that power once.

Important: Before starting with normal printing again, switch off the printer.
That gets you out of service mode.

Then switch on the printer again and print, as you like

Please come back and just gave a vote, it will gave me some satisfaction to know am helping some one so I will keep on helping.
All The Best: Pineworks