What does POST Beep - 1 Long 3 Short mean?
POST beep code indicating RAM failure or no RAM installed/detected.
Common causes
- RAM not installed
- RAM not seated properly in slot
- Incompatible RAM
- Failed RAM module
- Bent CPU socket pins preventing memory controller function
Diagnostic & testing steps
- 1. Power off, remove RAM, clean gold contacts with eraser
- 2. Reinstall RAM - ensure full click into slot
- 3. Try RAM in different slot (consult motherboard manual for correct slots)
- 4. Test with single stick of known-good RAM
- 5. Try RAM in another known-good system to verify RAM vs motherboard
Tools required
- Anti-static mat
- Eraser
- Screwdriver
OEM parts & part numbers
DDR4/DDR5 RAM Module
Safety warning
⚠️ Handle RAM only by edges. Never touch gold contact fingers.
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