HP Deskpro /S Desktop PC 386/20S Deskpro Personal Computers Service Reference - Page 53
-501, L = Long, S = Short
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POST Error Messages Continued Screen Message 301-Keyboard Error Beeps* None Probable Cause Keyboard failure. Recommended Action 1. Reconnect keyboard with computer turned off. 2. Check connector for bent or missing pins. 3. Ensure that none of the keys are depressed. 4. Replace keyboard. 304-Keyboard or System Unit Error None Keyboard failure. 1. Reconnect the keyboard with computer turned off. 2. Ensure that none of the keys are depressed. 3. Replace keyboard. 4. Replace system board. 401-Parallel Port 1 Address 2S Assignment Conflict IRQ address conflicts with another device. Reset the IRQ. 403-Parallel Port 3 Address 2S Assignment Conflict IRQ address conflicts with another device. Reset the IRQ. 404-Parallel Port Address 2S Conflict Detected Both external and internal ports are assigned to parallel port X. 1. Remove any parallel expansion cards. 2. Clear CMOS. 3. Reconfigure card resources and/or run Computer Setup (F10 Setup). 410-Audio Interrupt Conflict 2S IRQ address conflicts with another device. Reset the IRQ. 411-Network Interface Card 2S Interrupt Conflict IRQ address conflicts with another device. Reset the IRQ. 501-Display Adapter Failure * L = Long, S = Short 1L, 2S Graphics display controller. 1. Reseat the graphics card (if applicable). 2. Clear CMOS. 3. Verify the monitor is attached and turned on. 4. Replace the graphics controller. continued Deskpro Service Reference Guide D-3