Hope you haven't repaired it yet as there is a big billion sale on Flipkart & Great Indian Sale on Amazon that will start from tomorrow. Check them out as there are good exchange offers & 10% discount among other offers. Also there are no cost EMI's these days.
If there is a good exchange offer that you find valuable, I think you can repair it & then exchange.
Also, as Miss Usha Manohar has rightly said that getting a new one is a wise option.
We do not know whether the repair will last long given the fact that it is already 10 years. As per google search the average life of a laptop is being shown as 5 years & I am quite Suprised how it lasted double of the average!
Read the below link as well before taking a decision
https://www.quora.com/What-is-the-average-life-span-of-HP-laptops
Hope you take the best decision keeping long term benefits in mind rather than short term benefits.
In my personal view it is good to either exchange it or buy a new one in No Cost EMI. No Cost EMI's are coming with Debit Cards as well these days, check out if they are there in Flipkart & Amazon.
You also can buy a new one & sell the current laptop in any marketable place like in Hyderabad we have Jagdish Market in Abids where Cellphones are sold & we have CTC in Paradise where Laptops can be sold at a good price after enquiring at 5 to 6 places.