Blinking media control on Dell Studio 15 often caused by WiFi card problems. This usually happens when computer is being awake from sleep mode.

WiFi Card Problem on Dell Studio 15
Resolving this problem is simple. Just change the power setting on your laptop by checking the WiFi card and set the power settings to your desired preference. Turn on and off between the settings and see if it resolves your issue. If it doesn’t work, try reinstall Dell Touchpad driver.
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