Apple Macbook Pro Aluminum 13-Inch Black Laptop Keyb Technical Guide - Page 105

3. Inspect keyboard flex cable for Yes loose or damaged connections. Align and reseat to flex cable to ensure proper connections. No Does power-on key now work correctly? 4. Use conductive tool to assert Yes power on by touching poweron switch pads (R5015, located just above trackpad connector) on logic board. No 5. Disconnect the internal Yes keyboard flex cable and assert power-on switch pads on logic board. Removing top case power-on key from circuit should free on-board switch to No work properly. Cable reseat restored poweron key operation. Power-on key still appears to be stuck or open. Go to step 4. System powers on suggesting X14 top case power on key circuit is open. Replace top case for open power-on key. Power-on key circuit appears to be closed suggesting a stuck power-on key. Go to step 5. On board power-on switch X14 pads now starts the system. Replace top case due to stuck power-on key. Go to M01: No power/ not booting System Runs Hot Unlikely cause: LCD, hard drive, optical drive Quick Check Symptom System Runs Hot • System feels very warm • Fan(s) not working • Fan(s) are full on Quick Check 1. Verify the computer operating on a flat, hard surface and the vents are not blocked. 2. Verify the computer is not running hotter than expected for normal operation. If possible, compare to a similarly configured computer. 3. Reset SMC. 4. Inspect fan performance 5. Run thermal sensor test. 2008-09-18 MacBook(13-inch,Aluminum,Late2008)-SymptomCharts/MechanicalIssues:ThermalsandEnclosure 105