PC & Laptop Help Guides
Select your specific device model or error symptoms below to view step-by-step physical troubleshooting steps.
How to Fix Acer Aspire Power Light On but Black Screen
An Acer Aspire laptop showing a solid blue power indicator LED but a black, unresponsive screen has failed to wake from a deep sleep state or has a physical memory contact issue.
How to Fix Apple MacBook Air Unresponsive / Blank Screen
An unresponsive MacBook Air displaying a black screen and failing to boot is often in a deep system management controller (SMC) lockup state.
How to Fix Apple MacBook Pro 15-inch Intel Black Screen Won't Turn On
A locked System Management Controller (SMC) or corrupted NVRAM configuration blocks the system board from triggering the display backlight or power rails.
How to Fix ASUS TUF Gaming Fans Spin at Max (Black Screen)
An ASUS TUF Gaming laptop that boots to a black screen with fans spinning at maximum speed has failed POST (Power-On Self-Test).
How to Fix Dell Inspiron Black Screen and Caps Lock Blinking
A black screen paired with a blinking Caps Lock LED typically indicates a failure during the Power-On Self-Test (POST).
How to Fix Dell Inspiron 15 3520 2 Amber 3 White LED Blink
This flashing pattern indicates that the system's power-on self-test (POST) has failed to detect system memory (RAM).
How to Fix Dell Inspiron 15 5000 8 Beeps at Startup
This beep code indicates a failure in the laptop's Liquid Crystal Display (LCD) subsystem during the startup self-test.
How to Fix Dell Latitude 3 Amber 3 White LED Blink
A flashing battery LED showing 3 amber and 3 white blinks on a Dell Latitude laptop indicates a BIOS recovery corruption error or missing recovery flash image.
How to Fix Dell XPS 2 Amber 7 White LED Blink
A status light sequence of 2 amber and 7 white blinks on a Dell XPS laptop indicates a physical display (LCD panel) connection failure or lack of display signal detection during POST.
How to Fix HP EliteBook 3 Long 4 Short Beeps
A startup audio sequence of 3 long beeps followed by 4 short beeps on an HP EliteBook indicates a physical power rail failure or charging subsystem fault.
How to Fix HP Pavilion 15 Caps Lock Blink 3 Long 2 Short
This LED blinking code indicates that the embedded controller timed out during memory initialization.
How to Fix HP ProBook Caps Lock Blinks 5 Long 2 Short
A flashing Caps Lock LED with 5 long blinks followed by 2 short blinks on HP ProBook laptops indicates a system board power rail fault or a physical motherboard controller failure.
How to Fix Lenovo ThinkPad 3 Short Beeps at Startup
Three short beeps during startup on a Lenovo ThinkPad indicates a memory (RAM) post validation failure.
How to Fix Lenovo ThinkPad X1 Carbon Unresponsive Black Screen
This issue occurs when an electrostatic discharge (ESD) or power surge locks the internal embedded controller (EC) in a non-responsive loop.