Computer killed by insecticide; what compounds are likely? A friend of mine sprayed "Black Flag Home Defense" insecticide under her
computer. It died immediately. I'm trying to figure out why, and how
fixable it might be.

I found an MSDS, but it only says what the active ingredient is,
deltamethrin, 0.02%. Apparently everything else is proprietary and/or
non-hazardous.

Deltamethrin is not water-soluble, so I'm thinking that this probably
doesn't contain any water; more like nonpolar hydrocarbon sorts of
compounds. I'm thinking there's some particular nonpolar solvent that
makes up the bulk of it.

So, my questions:


Information or informed speculation as to the likely solvent
involved.
For those with knowledge of electronics, information or informed
speculation about the effect of such solvents on PC boards and
electronic components.


Answers to 1 alone are also useful, as I can then ask on
electronics.se what those compounds would do.

UPDATE: I don't have access to the computer myself. I passed on some of
the suggestions to my friend, and she will bring it in to a shop and see
how repairable the damage seems to be. Thanks for all your thoughts.

UPDATE 2: I spoke with the tech who looked at it. Apparently the
computer was very dirty inside; years of dust, cigarette smoke residue,
and insects. She's not sure exactly what happened, but there seems to be
a short somewhere on the motherboard, and that may have fried the power
supply as well. Given the dirt, it was probably not in good shape even
before the incident; the heat sinks were thoroughly clogged.

Overall conclusion: keep your computer clean! Keeping unknown chemicals
away from it is a good idea too.
Ingredients

So we could probably guess what's in the insecticide based on what's used in some of their other products.

Black Flag Flying Insect Killer

Tetramethrin - Sounds like the "active ingredient" here. By "active ingredient", I mean poison.  

D-phenothrin - Another poison. This product sounds like it kills more than one insect.

Petroleum Distilates - Likely a solvent. Unspecified

Liquefied Petroleum Gas - Propane or butane. An aerosol propellant. Was your product from a bucket or can? If a can, then it probably has this stuff.

So what happened?

My guess is that one of the products created a short circuit


  A short circuit is an abnormal connection between two nodes of an electric circuit intended to be at different voltages. This results in an excessive electric current limited only by the Thévenin equivalent resistance of the rest of the network and potentially causes circuit damage, overheating, fire or explosion. 


Typically, when something like a computer experiences a short circuit, it will stop functioning, "die", once the irreversible damage is done. As specified in the above text, circuit damage is likely done, and the circuits will need to be rewired. If there was no damage, then removing any remaining substances through a solvent, followed by thoroughly drying the computer, would remove the short circuit and allow it to function normally. It's possible that if the short circuit was created by a solvent, that the solvent has already been removed by evaporation, due to common organic solvents' melting points.