What do we have here? Oh about 15-20 years of dust and grime.
First vacuum the dust out, then using a damp kitchen cloth wipe the case clean. Use water only, no solvents. The results can be seen clearly.
The mainboard can now be cleaned with the aid of a vacuum cleaner hose and a paintbrush to loosen the dust. Be careful not to damage anything.
The mainboard fully cleaned. As with anything, time taken will make it look factory fresh.
The power supply. Dust the components as for the mainboard. For the grubby mains cord use damp cloth again and some vigorus wiping action.
The Power Supply completed. Note how well that power cord has come up. There's nothing worse than a filthy looking white cable.
This is the underside of the keyboard PCB. Dust it and while your there check the tracks over for any damage.
First job on the keyboard, a preliminary vacuum to get rid of the loose dust and hair that always seems to be attracted to keys.
Remove all the keys by gripping firmly and pulling them upwards away from the board. Note the order they come off!
All the keys removed, also the speaker grill removed(this varies according to machine issue) note also 2 keyswitches to be repaired.