mario7770 :
Hello there
so today I decided to clean my computer as I saw that there was some stains& dust in my motherboard since I didn't clean it for a while. so I decided to wash my motherboard with water and soap. I have seen on the internet several people have done this and it was successful.
The problem is I accidentally washed the motherboard while the CMOS battery is attached I am starting to wonder if it has caused any damaged to my motherboard
is there any steps that I should do before powering up my motherboard
Don't take any chances: take out the battery (if you haven't already) and dispose of it in recycling. A new battery will spiff up that spotless clean motherboard better.
I hope you rinsed thoroughly to get all the detergent out of nooks and crannies. Detergent is hygroscopic, absorbs moisture from the air, and moisture isn't good for electronics. Also dry well...a hair dryer generally works pretty well for drying out the board, coupled with an overnight air dry. Some people suggest sealing it up in a bag (the same bag it comes in inside the box) with dessicant to draw all the moisture out.
Otherwise it should be OK. BTW, in these days of environment friendly no-lead solders and citrus based halogen free flux cleaners water wash is the standard way to clean circuit card assemblies at the factory. You have just got to get the board very dry before powering it up.