ASUS X54H won’t POST after installing new RAM. Black screen, num lock and caps lock LEDs on

Title: Troubleshooting RAM Upgrade Issues on ASUS X54H Laptop: Black Screen with LEDs Lit

Introduction:

Upgrading RAM can significantly enhance your laptop’s performance. However, sometimes the process doesn’t go as smoothly as expected, leading to boot failures and startup issues. In this article, we explore common problems encountered when upgrading RAM on an ASUS X54H (or HR) laptop, illustrating practical troubleshooting steps to resolve black screen issues and LED indicators remaining lit after hardware changes.

Understanding the ASUS X54H Memory Compatibility

The ASUS X54H series typically features a single DDR3 RAM slot, originally configured with 4 GB of DDR3-1333 memory. When considering upgrades, it’s crucial to ensure compatibility in terms of type, speed, and capacity. Although the manual indicates support for certain configurations, third-party modules or mismatched speeds could cause boot issues.

Common Symptoms After RAM Upgrade

• Black screen on startup
• Power LEDs (such as Num Lock and Caps Lock) illuminated
• No POST (Power-On Self-Test) logo
• Laptop’s internal components (CPU and RAM) feel warm during attempted boot

Initial Troubleshooting Steps

1. Verify RAM Compatibility:
   Ensure that the new RAM module matches the laptop’s specifications—DDR3 type, appropriate speed, and capacity. While DDR3-1600 modules are often backward compatible with DDR3-1333 systems, some laptops may reject higher-speed modules or require BIOS adjustments.

2. Proper Installation:

3. Power off the device completely and disconnect from AC power.
4. Remove the battery for safety.
5. Carefully seat the RAM module, ensuring it clicks into place securely.

6. Reassemble and reconnect power.

7. Testing with Original RAM:
   Confirm that the laptop boots successfully with the original 4 GB module. If it does, the issue is likely related to the new RAM.

8. Try Different Modules:

9. Since two different 8 GB modules (DDR3-1600 and DDR3-1333) have been tested without success, it’s less likely that defective sticks are the issue.
10. However, testing known-good RAM from another compatible device can help rule out defective modules.

Advanced Troubleshooting Techniques

1. Reset CMOS/BIOS:
2. Remove power and battery.
3. Hold down the power button for 30 seconds to drain residual charge.
4. Use the small CMOS reset jumper if available or leave the CMOS