Laptop / MacBook — guides
MacBook black screen after sleep, Windows laptop sleep drain, battery, SMC, startup and overheating guides. NEXX GSM Bucharest.
MacBook — key combinations, SMC and NVRAM
SMC on Intel, Apple Silicon startup, NVRAM and other useful combos.
MacBook battery not charging: programming, repair or replacement?
Battery and BMS diagnostics, controller programming, and clear replacement criteria.
Swollen MacBook battery: stop using it and replace it
Warning signs, immediate steps, and why a swollen pack must be replaced.
Windows — boot keys by brand
F2, Del, Esc, F10, F12 — Boot Menu and BIOS by brand.
Laptop won't turn on — what to check before you bring it in
Laptop won't start — power, boot, board.
Laptop overheating or noisy fan — what to check before a shop visit
Laptop overheating — dust, paste, fan.
Windows laptop drains battery while sleeping or closed: what keeps it awake?
Battery empty or laptop hot after sleeping with the lid closed — diagnose Modern Standby first.
MacBook screen stays black after sleep: macOS Tahoe or hardware?
Black screen after sleep while the keyboard still reacts — software vs display hardware.