Member Avatar for fremernest

I have a toshiba satellite pro L300.When I start with the AC the machine refuse to start but with the battery it works and freezes after windows lunch. On safe mode the machine works perfectly either with the battery or when I plug in the AC adapter after starting up with the battery.
Need help fellows.

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  • Latest Post Latest Post by JorgeM
جميل سعيد commented: Touchpad +0

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Brief expert summary and next steps tied to the existing replies: ’s Satellite Pro L300 only reliably boots on battery, the machine will accept the charger after booting into Safe Mode, and a full reinstall didn’t fix it. correctly flagged the AC adapter as the cheapest check; pointed to drivers — which explains the Safe Mode difference, but a clean OS install makes a pure-software cause less likely. Two broad causes remain: failing power hardware (adapter, DC jack, regulators) or a power-management/ACPI interaction that only appears when full drivers load.

Practical tests (in order, cheapest first):

  • Power-reset: remove AC and battery, hold power button 30–60 seconds, reconnect AC only and try to power on.
  • Try a known-good, compatible Toshiba-style adapter (same voltage, equal/greater current). If the laptop still won’t start on AC only, the adapter or DC jack is suspect.
  • Observe the charging/power LEDs and feel the adapter/plug for heat. Wiggle the plug gently while plugged in — intermittent contact points to a bad jack.
  • With a multimeter (if available) measure the adapter output at the barrel and then at the laptop jack while plugged in; confirm the adapter actually delivers its rated voltage under load.
  • Attempt POST/BIOS with AC only (before Windows loads). If BIOS won’t power on with AC alone, it’s almost certainly hardware.
  • If AC works only after booting from battery or in Safe Mode, consider reinstalling Toshiba power/ACPI utilities or updating the BIOS as a last software check — but only after the hardware checks above.

If hardware looks faulty (adapter measures correctly but laptop won’t boot on AC, loose jack, swollen caps, or heat near the power board), plan for DC-jack replacement or motherboard repair. Stop and get a shop quote before major work — repair costs on an L300 can exceed the machine’s value. Safety note: disconnect battery and ground yourself before opening the chassis; if you’re not comfortable with soldering or diagnostics, take it to a reputable repair shop.

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Member Avatar for JorgeM

Have you installed something recently, updated a driver? Think about when this started happening, since you can boot into safe mode it sounds like a Windows related issue. Have you tried performing a system restore to an earlier point in time while in safe mode?

Member Avatar for jean122

ITG-JM is right.
if you have installed anything before this happend.
because a wrong driver, can cause problems with your hardware.
in safe mode, the most drivers are not loaded. thats why it is working in safe mode and not good in ''normal'' mode.
try to deinstall it in safe mode and look of it worked.

greetings jeannot

Member Avatar for fremernest

The problems still persist. I have actually formated. I can only start the machine with the battery and not AC charger. When I boot the machine in safte mode; then I am able to use the charger but not in normal mode.

Member Avatar for JorgeM

Can you get access to another AC adapter? There is really nothing in Windows that you can do to adjust a setting to fix this, at least I cant think of anything. The fact that you reformatted at least indicates to me that its not a driver or other Windows problem. You have the same problem on two different instances of Windows. That points me in the direction of a hardware problem. I would try a different AC adapter.

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