Exam 220-1201 Topic 1 Question 307 Discussion

Actual exam question for CompTIA's 220-1201 exam
Question #: 307
Topic #: 1
A user replaces their PC power supply and connects it to the components, but the PC fails to start. What is the most likely cause?

Suggested Answer: C Vote an answer

Modern motherboards require both the 24-pin ATX connector and a 4-pin or 8-pin CPU power connector. If the CPU power connector is not attached, the motherboard will receive power but the system will not boot. CompTIA A+ specifically lists this as a common mistake after replacing a power supply.
Insufficient wattage may cause instability, but usually the system still attempts to start. RAM does not prevent power-on if missing; instead, the system produces beep codes. Redundant PSUs are used in servers, not standard desktops.

by Horace at Jan 23, 2026, 11:02 PM

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