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220-1201 Practice Question: During a motherboard replacement, you install the…
During a motherboard replacement, you install the new board and connect all cables. When you power on, the system beeps continuously (long beeps). The CPU fan spins, but there is no display. What is the most likely cause?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The RAM is not seated correctly or is faulty
Continuous long beeps typically indicate a memory (RAM) issue. This could be due to improperly seated RAM, incompatible memory, or a faulty memory slot. The CPU fan spinning suggests power is reaching the board, but the POST process halts at memory initialization.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
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The CPU is not compatible with the new motherboard
Why it's wrong here
A CPU that is incompatible with the motherboard's chipset or socket type would typically prevent the system from POSTing entirely, resulting in no video output and often no beep codes, or a specific, distinct beep code indicating a CPU error, which varies by BIOS manufacturer. Continuous long beeps are not a standard POST code for CPU incompatibility. While a completely unsupported CPU might prevent any power-on sequence, a mismatched but physically fitting CPU might cause immediate shutdown or a very specific, non-continuous beep sequence.
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The RAM is not seated correctly or is faulty
Why this is correct
Continuous long beeps are a widely recognized POST (Power-On Self-Test) error code across many BIOS/UEFI manufacturers, specifically indicating a problem with the system's Random Access Memory (RAM). This typically means the RAM modules are either not fully seated in their DIMM slots, preventing proper electrical contact, or the modules themselves are faulty and cannot be initialized by the motherboard. Reseating the RAM or testing with known good modules is the primary troubleshooting step for this specific beep code.
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The power supply is underpowered
Why it's wrong here
An underpowered power supply unit (PSU) typically manifests as intermittent system instability, unexpected shutdowns during high load, or a complete failure to power on components like fans or hard drives, rather than generating specific POST beep codes. While a severely underpowered PSU might prevent the system from even reaching the POST stage, it wouldn't produce continuous long beeps, which are diagnostic of a specific component failure detected during the initial boot sequence. The system might power cycle or fail to initiate POST at all.
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The motherboard is shorting against the case
Why it's wrong here
A short circuit between the motherboard and the computer case, often due to missing standoffs or loose screws, usually triggers the power supply's overcurrent protection. This typically results in the system powering on for a very brief moment, perhaps with fans spinning momentarily, before immediately shutting down to prevent damage. This protective shutdown occurs before the system can complete enough of the POST sequence to generate continuous, diagnostic beep codes like those indicating memory failure.
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1 more way this is tested on 220-1201
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Variation 1. A user complains that their computer sometimes fails to boot and emits a series of long beeps. After several attempts, it boots normally. Which motherboard component is most likely failing?
easy- A.The CPU
- B.The power supply
- ✓ C.The RAM modules
- D.The hard drive
Why C: A series of long beeps during POST typically indicates a memory (RAM) issue. Intermittent boot failures with beep codes point to a failing RAM module, a dirty contact, or a loose connection. The beep code is a diagnostic tool from the motherboard's BIOS.
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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