While we wait for Midgar to answer, I would like to propose my theory on this.
It's a known fact that mothers hate computers. So much so, that when forced to reside in a same space with an offending compewter, they'll start to spontaneously emit Computer Ruining Antipathy Power - hereafter known as CRAP.
Normally compewters are build to handle this CRAP, and use their SUCK (also known as Self Upholding Capacity Knack) to combat this field of vile evil. However, seeing that this particular compewter was an old and tired one, its SUCK was probably not strong enough to protect it from his mother's CRAP anymore.
Soooo, my theory is that his mother's CRAP simply overwhelmed the poor computer's ability to SUCK it. Very sad.
Rest in peace, little computer. May your successor SUCK more.