Notebook freezing when connected to external power supply

What do you mean by freezing, there are devices sold that either heat or cool, but those are normally sold as refrigerators and heaters. Do you mean the mouse stops moving, or what????

yes the computer stops working, hangs.

If the charger is not plugged into the wall when you insert it into your Toshiba, does the PC hang? I'm thinking the socket in the Toshiba may be shorting out in some fashion when a plug, dead or alive, is inserted.

no, I tried keeping the charged plugged into the notebook with mains disconnected, and it works normally with battery, hang occurs as soon as I connect the charger to the mains

Let me see if H ave this right.

With the charger plugged into the lap top, but NOT connected to the mains, the laptop functions properly.

If you plug the power supply into the mains, the laptop goes stupid and hangs up.

IF that's the case, I would suspect that something is wrong with the charging supply. Such as the voltage is way high, causing the laptop top get annoyed and hang up.

Have you measured the charger output with no load on it? (I.e. not plugged into the laptop.)

Uninstall the Toshiba Power Managemnt utility if you have it installed. If that fixes it try reinstalling it. If you don't have the utility installed go to Toshiba and see if it is available for your

I measured the voltage and it's normal, tried several chargers anyway

I have plain Windows 7 installed at the moment, no Toshiba nor other utilities, even never connected to the network.

Anyway it freezes even in the BIOS when connecting power.

Good call, thanks Jamie.

Jeff

I'm testing it with a plain Windows 7 installed on a new hdd, never connected network, never installed other drivers or software.

ost

Even if it's plain Windows 7?

No windows update, no driver nor software installations done.

Of course it's possible.

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As I wrote, if I boot using battery and enter BIOS, it freezes when I connect power.

As I wrote, safe mode works ok even if connecting power.

I installed a new hard disk, so do you think I should install Toshiba utilities in Seven?

You said that this problem didn't occur with certain software -- only BIOS and W7. Which suggests a software problem.

Toshiba notebooks have not generally have this problem. You could push and pull the AC adapter's plug all day long, and the computer didn't mind.

I suspect the software interprets the tiny "glitch" when the plug is inserted (or removed) as a power loss, or a command to switch to Sleep/Standby.

Its your power management drivers and GUI software that is a problem.. uninstall and install the original drivers from the CD's or web sight for that laptop.

Since the unit seems to be locking, the driver software could be most likely is the issue and maybe proprietary to that lap top

Things like this happen after a Windows update, unexpected error on the HD, some one removed something they shouldn't of or, a funny program is running on board..

It's possible a bad onboard support circuit but I doubt that very much.

A simple test to prove this would be to boot to bias so the basics of the machine is on and energize the charger to see if a lock takes place there. Next, boot into safe mode, and try the same thing.. If all is ok up to this point. correct the software on board.

Have a good day.

P.S. some Laptops have a partition on the HD that has special set up software at boot time to configure the proprietary onboard chips.. This also could be an issue..

Does the hard drive light come on solid when it freezes, indicating it is in some sort of loop, or does it go out, or does it flash intermittently indicating it is not locked up?

IOS

and

it stays turned off, after lock up I see glowing these LED:

- power on

- power connected

- battery charging (if battery present)

What laptop(s) would have this feature?

Compaq, they were nortorious for having a special partition they would fail to boot if they didn't find.

Jeff

I've never owned a Compaq laptop but working in the industry when Compaq was the workstation of choice I would have thought I'd read about it somewhere. This must have been really proprietary as I've never heard of a chipset needing to load code from a fixed drive during boot. Can you give me an example of a model number and year and what operating system? Not that I don't believe you I'm just a bit taken back that onboard chips could be so proprietary that they couldn't be produced with their own non-volitile embedded instruction sets.

The Compaq Presario series comes to mind. They had a special 1-2 meg partition on the hard drive that the bios looked for and not finding, would hang the system. "OS NOT FOUND"

I found out the hard way, loading SCO Unix on one, going through the entire ordeal of loading the operating system (and mistaking wiping the service partition, then rebooting and finding I had to (a) replace the service partition and reload the service software and (b) start from scratch again with SCO Unix install.

Jeff

Jeffrey D Angus Inscribed thus:

I remember those ! Caused all sorts of mayhem. If I recall the trick was to wipe the MBR and sys the drive from a floppy boot disk.