Dell XPS 13 9340 — Thunderbolt 4 Not Working Fix Thunderbolt 4 symptoms ⚠ Thunderbolt 4 dock connected to XPS 13 9340 does not appear in Thunderbolt Control Center or does not provide display output, USB passthrough, or network connectivity ⚠ External monitor connected via Thunderbolt 4 cable to USB-C port shows no signal even…

ASUS · Vivobook 15 F1504 · i5-1235U Screen Brightness Not Changing Fix Screen brightness not changing on the ASUS Vivobook 15 F1504 i5-1235U means pressing Fn + F5 (decrease brightness) and Fn + F6 (increase brightness) has no effect, the Windows brightness slider in Action Center shows movement but the screen does not change brightness,…

Symptom Likely Cause Fix Windows shows less RAM than installed (e.g. 8GB instead of 16GB) One RAM stick not seated fully in slot Reseat both SODIMM sticks; check both slot locks click closed System boots with one stick but not two Incompatible RAM speed or one faulty RAM module Test sticks individually; use Lenovo-validated DDR5-4800…

ASUS · Zenbook 14 OLED UX3405 · Core Ultra 9 185H Fan Noise Fix Fan noise on the ASUS Zenbook 14 OLED UX3405 Core Ultra 9 185H means the cooling fan is audibly loud during light tasks like web browsing or document editing where fan noise is not expected, the fan produces a rattling or…

Dell Inspiron 16 5640 — HDMI Output Not Working Fix HDMI symptoms ⚠ External monitor connected via HDMI to the Dell Inspiron 16 5640 shows no signal, even though the monitor works with another device and the HDMI cable is known-good ⚠ HDMI output is detected in Windows Display Settings (shows the external monitor) but…

HP · EliteBook 660 G11 · Core Ultra 5 125U Keyboard Not Typing Fix Keyboard not typing on the HP EliteBook 660 G11 Core Ultra 5 125U means pressing keys produces no characters in any application, specific keys are non-functional, or the entire keyboard is unresponsive. The EliteBook 660 G11 uses an HP keyboard with…

HP EliteBook 840 G11 Core Ultra 5 125U Screen Flickering Fix Screen flickering on the HP EliteBook 840 G11 Core Ultra 5 125U appears as rapid flashing of the entire display or specific areas, horizontal lines appearing and disappearing, or the display brightness pulsing in a pattern. The EliteBook 840 G11 uses an Intel Arc…

DELL Latitude 5440 Core Ultra 5 134U USB-A Port Not Working Fix USB-A port not working on the Dell Latitude 5440 Core Ultra 5 134U means USB devices plugged into the USB-A 3.2 Gen 1 port are not detected, appear briefly and disconnect, or the port provides no power to connected devices. The Latitude 5440…

Brand ASUS ExpertBook B1 B1502 Processor Core i5-1235U Issue USB-C Not Charging USB-C not charging on the ASUS ExpertBook B1 B1502 Core i5-1235U means the battery does not charge when a USB-C power adapter is connected to the USB-C port, the charging indicator light does not turn on, or Windows shows a “Plugged in, not…

LENOVO · THINKPAD E16 GEN 2 AMD · RYZEN 7 7735U Wi-Fi Keeps Disconnecting Fix Wi-Fi keeps disconnecting on the Lenovo ThinkPad E16 Gen 2 AMD Ryzen 7 7735U means the laptop drops the wireless network connection intermittently during normal use, the connection is restored automatically after a few seconds, or the Wi-Fi adapter shows…