Did you have it fixed already? I’ve once experienced this flashing/flickering thing on my computer screen too but got it quickly fixed by this computer repairs Newcastle expert. Anyway, I can’t give you a rate for that as it can be different depending on the professional who’ll do the repairs and how much damaged your computer or laptop is. So the best thing to do about this is to directly contact a professional and ask for a quote. That way, you can also gauge if such expense is within your budget or still reasonable compared to buying a new computer.