Question about Toshiba Satellite Pro M15-S405 Notebook

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My mom's Toshiba L455D laptop was running hot then flashed an error message "go to new power source" then shut down and will not turn back on.

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First, you need to make sure your power adapter is providing enough power to both run the laptop & charge the battery. A very good way to do this is to compare your laptop voltage & ampere requirements (written on a sticker on the bottom of the laptop) with the voltage & ampere ratings of the power adapter. Voltages should be the same, or the power adapter's voltage about up to 0.5 volts more than the laptop's voltage rating. Amperage of the power adapter should be at least equal to or greater than the laptop's rating. It should never be less than the laptop's rating, or else the power adapter will be providing insufficient amperes to charge the battery. Of course, the power adapter's nominal amperage might be ok, but it degraded on usage. You can verify this by testing using a good or new power adapter.
If the battery did not charge using the new power adapter, take the battery off the laptop, & using a dry tooth brush, scrub in between the fins of the battery connector on the motherboard & on the battery it self, then put the battery back into the laptop & try again.
If this still did not resolve the problem, then the battery itself could be bad. Try it on another laptop, or try a good or new battery in your laptop.
If this did not work, there might be a possibility that the charging circuitry on the laptop's motherboard is defective & needs servicing. In order to do this, the laptop needs to be disassembled & the motherboard checked for defective/burned out components in the area near the DC jack. Any defective/burned out components found should be replaced, or you might need to replace the laptop's motherboard altogether.

Posted on Sep 07, 2010

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1 Answer

My toshiba satellite L455D-S5976 just shut off and won't turn back on what causes this


Overheating When the CPU overheats then it will shut down (i.e. thermal overload) and won't boot up again until it has cooled down. If this is the problem is not fixed then the CPU will eventually fail.
A faulty fan causes the problem or the fan and heat sink assembly are clogged with dust.
Check the CPU fan to see if it spins freely, if not replace the fan.
If the fan and heat sink is clogged with dust the remove the dust and make sure the vents are clear and dust free. Use a small brush and can of compressed air to do this.

Dec 04, 2012 | Toshiba Satellite L455D-S5976 Notebook

1 Answer

Keeps shutting down


Does the Blue screen appear before it shuts down? If so, what info does it give? What programs are you running, games/internet surfing, when it shuts down? How long has it been since you have cleaned it(compressed air)? Are you blocking the air vents, either on the back, sides or bottom of the computer?

Nov 05, 2012 | Toshiba Satellite L455D-S5976 Notebook

1 Answer

L455D-S5976 fan


Your laptop is getting too hot therefore you need to place in on a wooden surface like a table instead of your lap to prevent it from getting overheated.

Jun 06, 2012 | Toshiba Satellite L455D-S5976 Notebook

1 Answer

My toshiba laptop will boot when I power up but the screen stays black


Jeff, connect an external monitor for a diagnostic test.

Laptop OFF, monitor OFF, connect a VGA monitor to the VGA port on the back of the laptop,
(RGB/Monitor connector,

http://en.wikipedia.org/wiki/VGA_connector )

The external/VGA monitor can be a CRT type (Looks like a small TV), or a flat LCD screen that has a VGA cable.

Turn the external monitor on. If a CRT type allow it to warm up.
Turn the laptop on.

By default the display should show on the external monitor. If not press, and hold down on the Fn key, and tap the F5 key. (One of the Hot Key's)

If the display still does not show, hold down on the Fn key, and tap the F5 key again.
There are three display options;

1) Internal monitor of laptop ONLY
2) Internal monitor of laptop AND external monitor
3) External monitor ONLY

If graphics show on the external monitor, you have a problem in the Display Assembly, and/or the Video Cable.

If graphics do Not show on the external monitor, you have a problem with the graphics chipset on the motherboard.
(ATI Radeon 3100)

http://www.irisvista.com/tech/laptops/Toshiba-Satellite-Pro-L450-L455/laptop-disassembly-1.htm

Video Cable
1) Could be the connections. The connection of the video cable TO the motherboard, and the other end of the video cable TO the back of the LCD screen. (In the Display Assembly)

2) Could be damage to the video cable. Check the sheath of the cable for obvious signs of damage. If so, the thin tiny wires inside may be damaged also.

Cable should be checked for continuity of each wire in the cable. (Ohm's with a multimeter)

Video Cable condition, and tightness of connections check out, it's on to the screen Inverter.

Primer:
An LCD screen does not produce light by itself. It needs an additional light source.
A Backlight is the additional light source.

A Backlight is a CCFL, or a series of LED lights.

The Toshiba Satellite L455D-S5976 Notebook PC, uses 1 single CCFL for a Backlight.
Cold Cathode Fluorescent Lamp.

Similar to Fluorescent lighting used in homes, and businesses, but on a MUCH smaller scale.

A screen Inverter is used to convert the power (Electricity) from the laptop, for the LCD screen, and Backlight.

90 PERCENT OF THE TIME the fault is the Inverter.

The screen Inverter is a small rectangular circuit board, and is located behind the Display Bezel, an at the bottom of the LCD screen,

Example of screen Inverter,

http://www.battery-stores.co.uk/laptop-inverter.php/toshiba_Satellite+L455D-S5976_205_5226.htm

Link to a free Service Manual for the Toshiba Satellite L455D series of Notebook PC's,

http://www.tim.id.au/blog/tims-laptop-service-manuals/#toc-toshiba

Under the main Toshiba heading go down to the subheading -
Satellite A10. (A10 is in blue)
In this 'paragraph' go down to the third line, and scroll across to -
L450D, in blue.
Click on L450D.

This is a PDF file. The computer you are using now has Adobe Reader on it, which uses PDF files.
After you click on the file name { L450D } it may take up to 30 seconds before the first page comes up.

Would appreciate it if you would post back in a Comment with your findings.
Regards,
joecoolvette

Jan 15, 2012 | Toshiba Satellite L455D-S5976 Notebook

1 Answer

I have a Toshiba laptop L455d-S5796 and when I power it on it ask for a hdd1 password which I do not have. Is there any solutions I can get around this password?


you have to take apart your laptop, remove the tiny watch battery, and reassemble your laptop. that should allow you to bypass the password during that session, then you have to flash your bios, and re-install it (bios). after doing so, shut down your laptop, disassemble it again, and reconnect the watch battery, and reassemble your laptop for the last time, and you will no longer have your hdd password issue.

Aug 18, 2011 | Toshiba Satellite L455D-S5976 Notebook

2 Answers

My toshiba satellite L455D-S5976 Laptop says A disk read error occurred, how do i fix this, cause i wanna restore to factory settings but i have no disc for the laptop... Please Help!!!!


hi,
that error message is referring to your hard disk. Some of the sectors are corrupted and it might have to do with the part that contains your operating system or boot manger. You're advised to get a new disk, install a fresh copy of your operating system, and recover your files from the other disk by attaching it to the system like an external drive.
hope this helps

Jul 04, 2011 | Computers & Internet

1 Answer

I'm trying to figure out a toshiba satellite l455d-s5976 laptop. It shuts off automatically. If you leave it off for days, then it will run longer (30-60minutes) before it shuts off. Once it's off, you can...


Hi,

It's difficult to determine the exact cause of the problem but from your description it would appear that the laptop CPU is overheating. This would cause it to shut down as a safety mechanism to prevent your CPU or other components from permanent damage.

The first thing you need to do is open the laptop or have it opened by somebody in the know.
There are inlet & outlet vents whereby air is sucked in over the CPU which helps to keep it cool. These vents have filters which become blocked by dust & other debris in the air.

Cleaning the dust from these filters often sorts out overheating problems.
If this is not helpful in your case, it would be advisable to have a technician do further tests to determine the problem

Best wishes,
Graeme

Mar 11, 2011 | Toshiba Satellite L455D-S5976 Notebook

3 Answers

My laptop turn off, I think it got hot, I can't turn it on now. turn off Sunday


Hi
try this,
unplug dc plug from laptop. remove battery.
wait a few minutes. press and hold the power button for 10-15 seconds.
plug the dc power plug back into the laptop, but do not put battery back in yet. Then try to power on. if it powers on, let it run a few minutes, but best to keep checking to see if it is getting warm or hot anywhere. if it is getting hot shut it down immediately. If it isnt getting hot then shut it down and put the battery back in.

if it doesnt power up, then i would have to suspect heat damage to the motherboard.

Feb 15, 2010 | Toshiba Satellite A135-S4527 Notebook

1 Answer

Instantaneous shutdown of my Toshiba Satallite A105 Laptop


Hi Sam,

What operating system are you using ?

If you remember what time it last randomly shut down on you, use the system event viewer to see what errors were given just before it turned itself off. You can access the event viewer in Windows XP by clicking on the Start button, then click on Run, and in the box that pops up type in "eventvwr" and hit enter.

Click on system on the left hand side to view the log files of the system. Browse down until you find the time when your laptop turned off. Hopefully there is a series of errors there. They should be able to tell you something about why it is doing it.

Hope this helps, feel free to post some of the errors back here if you find any!

David

Nov 19, 2008 | Toshiba Satellite A105 Notebook

2 Answers

Toshiba Satellite: A135-S4427 / Won't shut down


Hi,
by pressing the power button in, the computer has gone into standby or hibernate mode.
Heres what you Do:- press and hold the power button for between 10 to 20 seconds.
that should bring it out of hibernation.
if that does,nt work. remove the main battery.
when you,ve resolved the problem, run a disk-scan via your windows operating system.

Mike @ Compurepair.

May 12, 2008 | Toshiba Satellite A135-S4427 Notebook

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