Main Troubleshooting Flowchart START No See Hard Disk flowchart See DOS or Windows? Get user information: Name Telephone number Unit serial number Repair history Yes No Memory OK? (No memory errors) See Memory flowchart Yes Eliminate all obvious physical problems? No Isolate damage. Refer to repair process Yes No Hard disk operates OK? See Hard Disk flowchart Yes No See Power Source flowchart Yes OB unit's power light comes on? Unit has at least 1- 1/2 hours battery life? No See Power Management flowchart Yes Single beep during boot-up? No See Boot- up flowchart Yes No Pop-out mouse works correctly? See Mouse flowchart Yes See something in display?
No See Display flowchart Yes External floppy drive operates correctly? No See Floppy Drive flowchart Yes A 13