YOUR NEXT STEP
What to check next
Computers sometimes report startup problems through beeps, flashing LEDs, diagnostic lights, or displayed codes. The meaning depends on the exact manufacturer and model, including the motherboard in a custom PC. Count the signals, note long and short sounds, colors, order, pauses, and whether the pattern repeats. RAM, graphics, motherboard, power, or other hardware may be involved; a signal alone does not confirm a failed part. Record a short video and let the shop know whether it is a repeating sequence or a continuous tone.
A short video of startup lights, sounds or the shutdown can help us understand the problem. Do not recreate overheating or an unsafe condition to record it. You can attach it to your message below. Sharing is optional; you do not have to disassemble anything or repeat a risky test.
A symptom can have more than one cause. These guides help you choose a next step; confirming a hardware fault requires testing.