Diagnosing common phone issues: charging, ghost touch, black screen

Most phone issues fall into a handful of patterns. Run through these before you decide whether it's a quick port clean, a screen swap, or something deeper.

Won't charge

Try a second cable AND a second wall brick. Most 'dead' phones are bad cables.
Shine a flashlight in the charging port — lint compacted at the bottom blocks the contact. Carefully pick it out with a wooden toothpick (never metal).
If wireless charging works but cable doesn't → the charging port needs replacement.

Ghost touch (screen taps itself)

Almost always the digitizer after a drop, pressure crack, or water exposure.
If it started after a third-party screen replacement, the screen is likely non-OEM and incompatible.
Restart helps temporarily — the fix is a proper screen replacement.

Black screen but vibrates / rings

Phone is on — the display or the display connector failed.
Force restart first (iPhone: Vol Up, Vol Down, hold Side. Samsung: hold Power + Vol Down 10s).
If it stays black, it's a screen or LCD-flex repair, not a logic-board issue.

No service / SIM not detected

Toggle airplane mode, then restart. Re-seat the SIM.
If a second SIM also fails → it's the SIM reader or the network chip.
eSIM-only phones with no service after a drop usually need board-level diagnosis.

Get a free phone repair estimate

Local techs in Lake County, FL. Free estimates — bring it in or we'll come to you.

Get a free estimate (352) 777-5531

Frequently asked

How much does an iPhone screen replacement cost?

Pricing depends on the model — newer Pro and Pro Max models cost more because of OLED + True Tone. Get an exact quote from the free estimate form.

Can you fix water damage?

Often yes, especially if the phone is brought in quickly and not put on a charger. We do an ultrasonic board cleaning and corrosion removal before deciding what else is needed.