Dell Inspiron 1545

I'm diagnosing a non-booting Dell Inspiron 1545 laptop for a friend. At startup it says "Internal hard disk drive not found". When I run diagnostics (F5) it confirms the absence of the HDD: ** Hard Drive - DST Short Test ** Test Results : Warning Msg: Hard Drive - No Hard Drive detected I've...

So I have an old dell inspiron 1545 laptop and want to upgrade some of its components so that it runs faster. I am aware that upgrading is not worth it and it is better to buy a new laptop but I can't buy one for while. I have currently upgraded the ram from 2gb to 8gb. And I upgraded the wifi...