We killed our computer.

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1. It's definitely frustrating when a seemingly straightforward upgrade leads to such issues! The three short beeps followed by a long beep is a crucial clue. This specific beep code pattern on Lenovo ThinkCentre desktops typically indicates a problem with the system memory (RAM).

   Here's a breakdown of potential causes and troubleshooting steps you can take to revive your Lenovo ThinkCentre M93:

   Understanding the Beep Code:

   • Three short beeps followed by one long beep on a Lenovo ThinkCentre usually points directly to a memory error. This means the system's BIOS (Basic Input/Output System) is unable to initialize or detect the RAM properly.

   Troubleshooting Steps:

   1. Double-Check RAM Installation (Even with the Old RAM):

      • Power Off and Unplug: Ensure the computer is completely powered off and the power cable is disconnected.
      • Ground Yourself: Touch a grounded metal object (like the unpainted metal chassis of the computer) to discharge any static electricity before touching the RAM modules or internal components. Static discharge can damage sensitive electronics.
      • Reseat the Old RAM: Carefully remove and then firmly reseat each of the original 8GB RAM sticks in their original slots. Ensure they click securely into place and the retaining clips on the sides are fully engaged.
      • Try One Stick at a Time: If reseating doesn't work, try booting the system with only one of the original RAM sticks installed. Try each stick individually in different RAM slots to see if one of them might have become faulty or if a specific RAM slot is the issue.

   2. Inspect the RAM Slots:

      • Visual Inspection: Carefully examine the RAM slots for any signs of physical damage, such as bent pins or debris. Use a can of compressed air to gently blow out any dust or particles that might be lodged in the slots.

   3. Check RAM Compatibility:

      • Verify Specifications: Although you mentioned it's DDR3, double-check the exact specifications of both your old and new RAM. Ensure they match the motherboard's requirements in terms of:
        • DDR3 Type: There are different speeds (e.g., DDR3-1066, DDR3-1333, DDR3-1600). While sometimes slower RAM can work in a system designed for faster RAM (at the slower speed), it's best to use the correct type.
        • Voltage: Ensure the voltage of the new RAM matches what your motherboard supports. Incorrect voltage can prevent the system from booting and potentially cause damage. You can usually find this information on the RAM stick labels.
        • Unbuffered/Registered (ECC): Desktop motherboards like the one in your ThinkCentre M93 typically require unbuffered, non-ECC RAM. Registered (ECC) RAM is usually for servers. Using the wrong type will prevent booting.
      • Lenovo Documentation: Refer to the official Lenovo ThinkCentre M93 hardware maintenance manual or specifications to confirm the exact type and speed of DDR3 RAM supported.

   4. BIOS Reset (CMOS Clear):

      • Sometimes, changes in hardware can confuse the BIOS. Resetting it to its default settings might resolve the issue.
      • Locate the CMOS Battery: With the computer powered off and unplugged, open the system unit and locate the small, coin-cell battery (usually a CR2032) on the motherboard.
      • Remove the Battery: Carefully remove the battery and wait for about 5-10 minutes. This allows the CMOS memory to lose power and reset.
      • Short the CMOS Jumper (Alternative Method): Some motherboards have a CMOS clear jumper (often labeled CLR_CMOS, CLRTC, or similar). Consult your motherboard manual to locate it. With the power off and unplugged, move the jumper to the "clear" position for a few seconds, then move it back to its original position.
      • Reinstall the Battery: After waiting, reinstall the CMOS battery.
      • Try Booting: Plug the computer back in and try to boot it.

   5. Check for Other Loose Connections:

      • While you were working inside the computer, it's worth quickly checking other internal connections, such as power cables to the motherboard, data cables to the hard drive/SSD, and any expansion cards. Ensure they are securely plugged in.

   6. Consider Potential Damage (Less Likely, but Possible):

      • While handling the RAM, there's a small chance you might have inadvertently caused a static discharge that damaged a component (though grounding yourself should prevent this).
      • It's also possible, though less likely, that the new RAM itself is faulty.

   If None of the Above Works:

   • System Board Issue: If you've tried all the above steps with your original RAM and the beeping persists, there might be an issue with the motherboard itself, specifically the memory controller. This is a more serious problem and might require professional repair or replacement of the motherboard.
   • Seek Professional Help: If you're not comfortable with any of these steps or if the problem continues, it's best to take your computer to a qualified computer technician for diagnosis and repair.

   In summary, the immediate focus should be on ensuring the original RAM is correctly installed and trying to clear the BIOS. The three short beeps followed by a long beep strongly indicates a memory-related problem, so meticulously checking the RAM and its connection to the motherboard is the most crucial first step.

   Good luck, and I hope you can get your ThinkCentre M93 back up and running!

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