Join Date: May 2002
Location: Toronto, Rogers, 9865 & 8300-eHDD, Sharp LC75N8000U, Denon AVR4310Ci; Sony KDL40W3000, 9865
I'm assuming that the unit wasn't used for a while (years?). If so, the lubricant in the motor is probably viscous (old and thick) and as it heats up it becomes less viscous allowing the motor to spin more freely. The lubricant may also not be lubing as well as when it was new - or has migrated to places it doesn't do any good, hence it's getting worse. Please advise make, model, year of manufacture, etc. You may need a new motor, or perhaps the fan impeller is the issue - same story about the lubricant if it's the impeller (bearings) that are the source of the problem.