Concerns before attempting a Reflow of Laptop's GPU

[Mr_Nada]

I saw some posts at one point talking about doing a reflow but I couldn't find them again so I thought that I would post this here.

I plan on reflowing the GPU of this old HP DV2500 laptop but I want to go over what I have and the steps I have to take to guarantee it will come out fine.

I have a Yihua 8786D 2in1 Rework station, flux (just some paste that I got from an old Radioshack kit), a couple rolls of Kapton tape and a $15 Thermometer +probe (a TM902C from EMR shielding Solutions if its important).

• The paper that came with the thermometer states that the probe is rated for over 300C (K type,Tp-01), I've already tested it in ice water and it appears to be accurate.
• The tape is rated for 500F or 260C (I'll come back later and edit it when I find the brand name again)

I'm concerned if:

• The thermometer that I have will be accurate enough for this
• The board may warp from only heating one side
• The flux I have may cause some unforeseen problems with the reflow.
• The Airgun will for some reason not be powerful enough (if it turns out that I need more heat than it's able to output)

I'm unsure about:

• How long I have to let it heat up for
• What temperature I have to set/let it heat up to

Is there anything I should consider switching out or is there some guide that I missed that would help me figure out some what I'm unsure about?

If it works I plan on adding some stuff to the GPU so it won't heat up as much and break its solder balls.