The two red lights may be blinking in a sequence that gives you a code. For ex.: left light rapid blinking non-stop, right light - slow blinking 3 times, pause, repeat.
If you can discern a pattern, try to find the meaning in the owners manual or the manufacturer’s website. Or you could google the printer name and model number and the words ‘error codes’.
By finding the correct meaning of an error code, you might find that all you need is to replace an inexpensive part or do some maintenance (like clear a paper jam or clean the roller).
Good luck.
RT
They are just blinking at a steady rate (and from what I can gather from the manual that means problems with both cartridges which has to be a problem with the printer, since I have changed them both).