What was found
WHILE AT CRUISE AT 10,000 FT, RECEIVED DISPLAY COOL CAUTION MESSAGE, COMPLIED WITH QRH, MESSAGE DID NOT CLEAR. ON DESCENT, CLEARED AT 8,000 FT. AIRCRAFT REMOVED FROM SERVICE. PERFORMED OPS CHECK OF PILOT DISPLAY REVISION SWITCH PANEL AND CO-PILOT IAW CRJ200 AMM 34-25-11, OPS CHECK GOOD AT THIS TIME. AND PERFROMED OPERATIONAL CHECK OF DISPLAY SWITCH PANELS, OPS CHECK GOOD AT THIS TIME NO FURTHER DISCREPANCIES NOTED.