Dear Sifu,
WTA , i'm having "Error" message during i press and release my D90 shutter button. Can be hear the motor is trying to do the task but it not working so. i try de-attach my lens and it just working fine for a while but back to the same problem after few times shutter button been pressed while now is totally down, as well as not allow me to preform photo shooting since the shutter button not responding. The "Error" message just keep present at display and i have no idea what else i can be done on my toy... if anyone of sifu here can help give advise and guidance for me to solve this bothering problem. a thousands of thx in advance to you

The shutter kapputt already i assumed. Got to change the shutter. Send for checking la

ok thx razuryza. how much estimate for this part exchange? any idea?

try twist ur lens, does it fit??
my D80 once have this problem, its the lens attach ring problem

It could be the battery. Happened to my D700 as using as old battery. After change with fresh new battery..everything works fine!

had change few different lens still same issue.. guess might not related to len. anyway thx Sifu!

Thx matrix123, this is great input to me but i did checked my battery condition via body and its shown my battery is in good condition (metering show 0 which is working fine as fresh, if it indicate 4 meant its going to death soon). anyhow i will hunting to nearest shop if i can get the replacement battery or not. thx again for your advice...