Technician helping troubleshoot Motorola phone screen brightness not working

Steve H.

Reviewed for technical accuracy

Specialities: Android side button / power button not working, Side key not responding on Samsung Galaxy, Pixel power button opens Assistant, button stuck.

Side (power) button not working on Android? Common reasons + what to check first (case, debris, settings, restart options)

Technician avatar Technician
Hi — I can help. When an Android side button (power button / side key) stops working, it can feel alarming because you can’t easily lock the screen, take screenshots, or bring up the power menu.

We’ll keep this simple and safe. Trust moment: I don’t want you forcing the button or tapping it rapidly (some phones can trigger Emergency/SOS features). We’ll start with the least risky checks first.

Quick question: what exactly is “not working” for you?
A) It won’t lock/wake the screen at all
B) It clicks, but does the wrong thing (like opens the camera/assistant)
C) It feels stuck/jammed and barely moves
Customer
It’s A and maybe C. It used to turn the screen on and off. Now nothing happens. I’m nervous I’ll get locked out.
Technician avatar Technician
You’re not alone — seniors tell me this is one of the most stressful phone problems because it affects basic control.

First, a safety check: is the phone still turning on and working normally once the screen is awake (touch works, apps open), and it’s only the side button that’s not responding?
Customer
Yes. Touch works. I can use the phone. I just can’t use that button anymore.
Technician avatar Technician
Good — that usually means the phone is fine, and we’re dealing with either a physical button issue (stuck, dirt, case pressure) or a settings change after an update.

Two quick “when did it start” questions (answer either one):
• Did this begin after an Android update?
• Did you change your phone case or drop the phone recently (even a small bump)?
Customer
It started suddenly yesterday. I did put a new case on. No big drop, just normal use.
Technician avatar Technician
That’s a very common cause. Some cases press the side key slightly or misalign the cutout, so the power/side button feels dead even though the phone is fine.

Safe first test: can you remove the case for one minute and try the side button again? No settings, no risk — just checking if the case is blocking the button.
Customer
I can take it off. But if it still doesn’t work, what then? I don’t want to break it by pushing hard.
Technician avatar Technician
You’re right not to push hard.

Trust moment: I do NOT want you prying around the button with a pin or a knife. That can damage the seal and make things worse.

If the case isn’t the problem, the next safe checks are:
• Look closely around the button for lint/grit (a tiny bit can stop the click). A soft cloth is enough.
• Check if the button is “working” but remapped (some phones change what “press and hold” does).
• Use an on-screen option for power menu/lock until the hardware is sorted.
Customer
I mainly need to lock the screen and sometimes restart. How do I restart if the side button doesn’t work?
Technician avatar Technician
Great question — and there are safe alternatives that don’t require that button.

Many Android phones have an on-screen power menu icon in Quick Settings (the panel you pull down from the top). There’s also an Accessibility Menu that can add a floating button with a “Power” option for seniors who need easier controls.

Before we choose the best path: what phone do you have (Samsung Galaxy, Google Pixel, Motorola), if you know?
Customer
It’s a Samsung Galaxy. I’ve heard “side key” on this phone. I don’t really understand the settings.
Technician avatar Technician
That helps — Samsung often calls it the Side key and it can behave differently depending on settings.

On many Galaxy models, the power menu can appear with a button combination (Side key + Volume Down). If your side key isn’t responding at all, we won’t rely on that — but it’s useful to know for testing later.

For now, we’ll focus on the simplest path: use the screen options to lock/restart temporarily, and separately figure out whether the side key is physically stuck or just not registering.
Customer
Could this be from an update? I did get a system update a few days ago. But the button worked until yesterday.
Technician avatar Technician
It can be related, yes — updates sometimes change how “press and hold” behaves (for example, opening a voice assistant instead of power options). But if the side key does nothing (no click response), the case/debris angle stays high on the list.

One more gentle question: does the button feel different physically — softer, harder, stuck, or no “click” feeling compared to before?
Customer
It feels kind of stiff. Like it doesn’t move the same. I’m scared something is stuck in there.
Technician avatar Technician
That’s a useful clue. If it feels stiff, it’s often a simple obstruction (case edge, pocket lint) rather than a deep failure.

Trust moment: let’s avoid “digging.” The safest approach is: remove the case, wipe around the button with a dry microfiber cloth, and check if the button returns to a normal click. If the phone had any moisture exposure (rain, cleaning spray), we avoid pressing repeatedly and let it dry naturally.

While we’re diagnosing, we can also set up an on-screen way to lock and restart so you’re not stuck.
Customer
Can this be fixed without service? I really don’t want to bring it to a shop unless I have to.
Technician avatar Technician
Often, yes — many “side button not working” cases are solved by case fit, gentle cleaning, or a setting adjustment. And even if the hardware needs attention, you can still use the phone safely with on-screen controls in the meantime.

If you tell me after the case test whether the button clicks normally again, we’ll know the next safest step. And if it stays stiff and unresponsive even without the case, that’s when we consider a careful inspection or service — but we don’t jump there first.
Customer
Thank you. I’ll remove the case and clean gently first. If it still doesn’t work, I’ll use an on-screen option and then decide about service.

Quick answer: the accepted fix

Accepted first approach for Android side button not working: confirm whether it’s a simple physical blockage (case/lint) or a settings change, and set up a safe on-screen backup so you can lock/restart without the button.

What most often helps (safe checks):
• Remove the phone case and test the side/power button again (case misalignment is common).
• Gently wipe around the button with a dry microfiber cloth (avoid sharp tools).
• Use Quick Settings power menu (if available) or enable the Accessibility Menu as an on-screen backup.
• Restart the phone using the safest available method for your model (screen option first; button combo only if the key still responds).
• If it started after an update, check side key / power button behavior settings (some phones change what press-and-hold does).

Why an Android side button can stop working suddenly (common reasons)

Most side button problems start from simple causes. A new case can press the button or block its movement, and pocket lint can make the button feel stiff or “dead.” After an Android update, the press-and-hold action can change (for example, it may try to open a voice assistant instead of showing power options). Less commonly, moisture or a drop can affect the button mechanism.

What to check first: case fit, button feel, on-screen power menu, and Accessibility Menu

Start with the lowest-risk checks: remove the case, then see if the button click returns. If the phone works normally but the button doesn’t, set up an on-screen backup for seniors — Quick Settings power menu or the Accessibility Menu shortcut — so you can lock/restart without stressing about the hardware. If the button works sometimes but does the “wrong thing,” it may be a side key setting change after an update. If the button is stiff and never clicks, avoid forcing it and consider a careful inspection.

Android side (power) button not working — calm, senior-friendly next steps

Use safe checks first, and set up an on-screen backup so you can lock and restart without the button.

Best approach: make one change, then test again so you know what helped. Try the case-off test first, then a gentle clean around the button (no sharp objects). If you need a quick workaround, the Accessibility Menu can give you a large on-screen “Power” option, and some phones also show a power icon in Quick Settings. If the button feels stuck or the phone had moisture exposure, avoid repeated pressing and consider professional help if it stays unresponsive.

Disclaimer: This information is AI-generated and intended for general guidance only. Avoid forcing stuck buttons or inserting objects near the button. For device-specific steps, consult a verified expert on Whizz-Tech or the manufacturer’s support before making decisions.

Additional troubleshooting options

Getting Started Is Easy

Ask for help, 24/7

Members enjoy round-the-clock access to 12,000+ verified Experts, including Android side button not working, power button not responding, Samsung Galaxy side key issues, stuck button symptoms, and safe on-screen alternatives like the Accessibility Menu.

Expert will respond in minutes

We’ll help you figure out what to check first — case fit, debris, side key settings after an update, or a safe on-screen power menu — without risky resets or confusing steps.

Save time & money

Many side button problems are caused by a case pressing the key, lint buildup, or a setting change — not a broken phone. Safe checks and on-screen options can reduce stress and help you avoid unnecessary repair visits.

FAQ

Why did my Android side button stop working suddenly?

This often happens because a phone case blocks the button or presses it in the wrong spot. Pocket lint or grit can also make the button feel stiff and unresponsive. Sometimes the button still works but its action changed after an update (for example, press-and-hold behavior). Start with safe checks before assuming the button is broken.

My side button stopped working after an update — is it a setting change?

It can be. Some Android updates change what pressing or holding the power button does (like opening a voice assistant). If the button still clicks but doesn’t show the power menu, it may be a side key setting. If the button feels physically stuck, focus on case fit and gentle cleaning first. Use an on-screen power menu as a backup while you troubleshoot.

Is a side/power button problem hardware or settings?

Both are possible, so we look at patterns. If the button feels stiff, doesn’t click, or never responds, it’s more likely physical (case pressure, debris, wear). If it responds but does the “wrong thing,” it’s often a settings change. Either way, you can use safe on-screen alternatives while diagnosing. Avoid forcing the button to prevent damage.

Can this be fixed without service?

Often yes, especially if the cause is a case issue or lint around the button. Many users can manage day-to-day needs using Quick Settings power options or the Accessibility Menu without a repair. If the button remains stuck and unresponsive with the case off and after gentle cleaning, service may be needed. Until then, using on-screen controls helps you stay in control of the phone.

Sources

Filed under: Touchscreen & Buttons

Matt Verified Icon
Matt ● replies in < 1 min
Technician Expert
⭐⭐⭐⭐⭐ Trusted by 27,000+ customers
Avatar
Alex · Expert's Assistant
5 Tech Support Specialists are online right now.