Can i replace 3 (parallel) capacitors 16v 1800uf with 16v 2200uf?
Increasing capacitance within reasonable limits won't cause trouble in a power supply bypassing scenario, which is the case here.

If the caps are in a hot place, make sure you use 105°C rated caps, and not 85°C ones. Note that even at a much lower temp like 50°C, the higher rated cap will last longer.

These look like they're at the input side of the CPU VRM, which means they will handle high currents. Low-ESR caps are required in this position, try caps specified for switching power supplies for example.

Personally I would use these, they're cheap and high quality.

General-purpose aluminium electrolytic caps (the ones that aren't specified for low-ESR) are likely to have too much ESR to use here.

Also check this link, apparently you're not the only customer to have problems with this mobo...