Lenovo ThinkPad 760CD ThinkPad 380, 385, 560, 560E, all 760, 765 and SelectADo - Page 226
For Model 760CD, 760ED, 760XL, Port Replicator Power Overload
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4. Disconnect the AC Adapter, remove the hard disk and diskette drive, and install the charged battery pack; then check that power is supplied by the battery pack. If you suspect a power problem, see the appropriate power supply check in the following list: "Checking the AC Adapter." "Checking Operational Charging" on page 215. "Checking the Battery Pack" on page 215. "Checking the Car-Battery Adapter" on page 216. "Checking the Backup Battery" on page 217. "Checking the Standby Battery" on page 218. "Port Replicator Power Overload" on page 222. Checking the AC Adapter: You are here because the computer fails only when the AC Adapter is used. If the power problem occurs only when the port replicator is used, replace the replicator. If the power-on indicator does not turn on, check the power cord of the AC Adapter for correct continuity and installation. If the operational charge does not work, go to "Checking Operational Charging" on page 215. Note: For Model 760CD, 760ED, 760LD, 760ELD, 760XL, and 760XD, there are two types of adapters. The procedure for checking both types is the same. 1. Unplug the AC Adapter cable from the computer and measure the output voltage at the plug of the AC Adapter cable. See the following figure: (20 - 10 V) 21 Pin Voltage (V dc) 1 +18.0 to +21.0 2 Ground (16 - 10 V) Pin Voltage (V dc) 1 +14.5 to +17.0 2 Ground If the voltage is correct, make sure the connection between DC/DC card and system board is not loose. 214 IBM Mobile Systems HMM
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