this is what you do. DO NOT turn it on after it has touched water. turn it off. remove your sim card and put it in a zip lock bag or a air tight container with dry uncooked rice and Desiccant's. (silica packs). My iphone 3g was submerged in water and in about 3 days of sitting in a container/hot cali sun, it was up and running perfectly.
The ps3 fan has 3 fan speeds (factory standards) In summer its humid hot etc the air blowing out might not be HOT but the components inside are so this is what its cooling down! You can notice the fan is louder when it goes at full speed but this is normal 3RD party fans DO NOTHING IN THE SLIGHTEST! Get AIR CON Or get a small fan blowing air onto the console. And make sure it isn't clogged up with dust.
Error 003 is caused by system menu 4.2/4.3+ and ios70/80 on region changed Korean wiis The FIX- You need to install ios60-v6174 into ios slot 70, 80, 90. Then Never ever update from Nintendo again. Be sure to install priiloader to block updates. Alternatively, you can use modmii to install the need patched ios.
I'd say check for any loose connections 1st. If the housing itself is causing the backlight function to stop, it could be something more internal with the LCD/digitizer. I'd say the digitizer must be replaced as a (whole unit together -LCD and digitizer together) as it looks to be damaged based on your point that the back-light does not work or stops functioning when pressure is applied. By the way how did you repair those brass clips that were bent? Can one find replacements? Look forward to your reply.. Good luck