Ram Repair for GBA mounted chips

[andy smethurst]

Hello, I purchased a laptop at an auction with a 2gb ddr2 ram card inserted,but I was getting ram error beeps every time I turned it on.
I tried it in 2 other laptops, and was greeted with the same error beeps.
This is a Hynix 2gb ddr2 module, and noticed that all the chips on the board are grid ball array mounted. I also noticed a sign of rough handling as it had deepscratches on one side where it locks in to the slot.(no track dammage)
I suspect bending and poor handling may have separated one or several of the soldered points on one or more of the IC's.
I have repaired video chips on laptops with GBA conections, using a heat gun and no-clean up flux.
Could the same procedure fix a problem in this situation?
Has anyone out there tried this with failure or success?
I would very much like to hear from anyone who has attempted this.
I think I will try it anyway, as I have nothing to lose,and seeing that this GBA method of soldering components is getting more popular in industry, we people who repair electronics without very expensive equipment will have to find alternative methods of repair, or throw it in the bin and buy new all the time, and look for new hobies and interests,other than electronics.

Thankyou for any Ideas.