Phone won't turn on? How to tell a dead battery from a black screen or a dead board

A deeply drained battery can look completely dead and take a while to show life. Don't skip this.

• Plug into a known-good charger, cable AND wall socket (not a laptop port)
• Leave it for at least 30 minutes before testing
• Watch for any charging icon, LED, or a low-battery symbol appearing
• Try a second cable/charger — a failed one mimics a dead phone perfectly

If charging shows nothing, force a restart. The exact button combination varies by model — on most iPhones it's a quick Volume Up, quick Volume Down, then hold the side button; on many Android phones it's holding Power + Volume Down for 10–20 seconds. Hold long enough for a logo to appear.

Check whether the phone is running but not displaying. If it vibrates, makes notification sounds, rings when you call it, or feels warm, then it's powered on and the fault is the screen or backlight — a much cheaper fix than the whole phone.

Use what you observed to narrow it down:

No reaction to charging, or a phone killed by water or a surge, usually means a power-management or board fault that needs micro-soldering. The good news: a no-power phone often still has perfectly intact storage, so a board-level repair can bring both the phone and your photos back. iTweak does chip-level board repair with a focus on preserving the storage chip, diagnoses before quoting, and offers free insured pickup across India if you can't reach a centre.