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where can I get my Printer HP PSC 1510 repaired in London?

My HP PSC 1510 All-in-one printer seems to have problem. The “Check Print Cartridge” button flashs, indicating that the black ink cartridge is empty. I have replaced the cartridge and cleaned the printer but the problem persists. I am wondering whether there is a cheap way to solve the issue rather than bin it?
I am grateful for any advice.
I live in the London, UK.

Probably cheaper to buy a new printer. All in one printer/scanners start at about £40 in supermarkets like Tesco Extra.
Look for one that has individual ink cartridges, you save money because you only change the colour that runs out and not the whole cartridge when just one colour is empty.
I like Epson because you can get cheaper (non Epson) compatible cartridges that work very well

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