Video Dram Chip Troubleshooting - NEC POWERMATE P60D Service Manual

3-20 Options

Video DRAM Chip Troubleshooting

If a fault occurs at power-on, verify that the reassembly was performed correctly. One beep
indicates that the computer has completed its power-on self-test. If intermittent beeping
occurs, turn off the computer and try again. If the beeping persists, see Section 4,
Maintenance and Troubleshooting.
Table Section 3-10 summarizes problems that may develop after installing a video DRAM
chip and lists in sequential order suggested corrective actions.
Table Section 3-10 Video DRAM Chip Problems and Solutions
Problem Symptom
No power Power lamp on computer
status panel will not light.
Operating An invalid configuration
system does message is displayed.
not boot
Video DRAM Cache memory is not
malfunction recognized.
Keyboard or Monitor has prompt, but
mouse cannot input data.
malfunction
Solution
1. Check that the power cord is plugged into
the AC connector on the computer. Check that
the other end of the cord is plugged into a live
properly grounded AC power outlet.
1. Press F1 to run setup and view parameters.
1. Reseat the video DRAM chip checking for
bent pins and correct orientation.
2. Replace video DRAM chip.
3. Replace system board.
1. Check that the keyboard is plugged in.
2. Check that the mouse is plugged in.