Satellite U400 wont turn on & when on wont come back from sleep mode

I have a Satellite U400 and its a year and a few months old.
In the last little bit it has been acting up, and it started with when the computer goes to sleep and goes to the black blank screen it will not come back from that.
The only way to do anything is hold in the power key till it turns off and then turning it back on. This brings me to the warning screen I have turned my computer off incorrectly. It has been doings this for a few weeks and started randomly out of the blue.
Then just today it wouldnt turn on at all, I was pressing the power key and the key itself would light up, and on the bottom right hand side the little lights would light up but wouldnt turn on, I kept pressing it over and over and over again and finally it did turn on. Once on I only used it for a few mins before turning off again and then would do the same thing, I kept pressing the bottom till it turned on. Its been on now and hasnt turned off again.
Not to log ago I had to reformat my computer due to me forgeting my password and had locked myself out of the computer. About a week after that is when the issues started. I am not all that computer smart, to be honest, I do understand something things, I can follow step by step to do something.
I really dont want to pay to have it fix I want to just do it myself and soon as its in great shape and never had any issues before.
Does anyone have any idea what this could be, or why it could be?
I am thinking about reformatting again as I am worried that didnt work out right the 1st time or something.
Or if this is something that needs to be repaired does anyone have a clue on the cost of it?
Thanks ^_^

hi aev270,
sounds like a serious problem to me.
try the following: take out battery, cd-rom, hdd and try again.
if it starts up without this components - you got lucky!
this means it probably a software issue (but i dont think so - sorry)
do you see the toshiba logo / bios messages? no - the you are in trouble.
this strange behaviour could depend on many things: defektive components like ram or grafics... or (badest thing) the mainboard...
if you have still warranty on it you should go to a servicepartner having the system checked.

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Satellite P850-30W - Fan does not run after coming back from sleep mode

I got a Toshiba Satellite P850-30W with bios 1.90.
Sometimes the fan does not run at all after coming back from sleep mode on windows 7.
This has happened twice (maybe more times without me knowing), and Ive had the computers for a month.
Normally the fan starts running when the CPU gets over 50 celsius, and stops under 50 celisus...
I tried running Prime95 when this fan-issue occured and the computer temps got dangerously high (close to 100 degree)! the fan did not start at all
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to get the fan running again I have to restart windows
anyone else experienced this?
I guess the fix would be to never use sleep-mode...or toshiba needs to fix it with a bios update.

What kind of answer do you expect here in user community?
Exact info about the fault? I dont think that somebody would be able to provide exact answer but just speculations
In other Forum you can read about Satellite notebook; but is it exacts the same model?
No, it seems to be an L650 series. Its completely different series .
From my opinion its not software related problem.
BIOS issue?
Well, in case it would be a BIOS issue, the problem would appear always and not sometimes after being shut down 200 times.
It could be a hardware related issue. Memory? Maybe
In my personal opinion to get more details hardware diagnostic software should be used in order check the hardware for possible malfunction. Thats my personal opinion

When trying to log back from sleep mode, the screen behaves as a rotating cube, with the mouse pointer in the top left corner. Hangs.

iMac OS X Ver 10.7.3
21.5 Inch, Mid 2011
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12 GB 1333 MHz DDR3
When the computer in woken from sleep mode we see two login options (bineg used by two users).
But when we try to login, the screen just behaves as a sluggish rotating cube.
Nothing works, we just have to hard boot at this time.

Please read this whole message before doing anything.
This procedure is a diagnostic test. It’s unlikely to solve your problem. Don’t be disappointed when you find that nothing has changed after you complete it.
The purpose of this exercise is to determine whether the problem is caused by third-party system modifications that load automatically at startup or login. Disconnect all wired peripherals except those needed for the test, and remove all aftermarket expansion cards. Boot in safe mode and log in to the account with the problem. The instructions provided by Apple are as follows:
Be sure your Mac is shut down.
Press the power button.
Immediately after you hear the startup tone, hold the Shift key. The Shift key should be held as soon as possible after the startup tone, but not before the tone.
Release the Shift key when you see the gray Apple icon and the progress indicator (looks like a spinning gear).
Note: If FileVault is enabled under Mac OS X 10.7 or later, you can’t boot in safe mode.
Safe mode is much slower to boot and run than normal, and some things won’t work at all, including wireless networking on certain Macs.
The login screen appears even if you usually log in automatically. You must know your login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin.
Test while in safe mode. Same problem(s)?
After testing, reboot as usual (i.e., not in safe mode) and verify that you still have the problem. Post the results of the test.

Why does my computer turn black when I wake it up from Sleep Mode

When I need to go somewhere or just eat lunch, I put my iMac to sleep. After that, when I come back to wake it back up, it stays black, I called Apple Support and they said I need to pay 20 dollars just to see if they can resolve the issue. So, if there is anyone that knows how to resolve this issue, I would very much appreciate it.

Try resetting your iMac's SMC and see if that fixes your issue. This happened to me once with my MacBook Air and resetting the SMC did the trick.
Shut down the computer.
Unplug the computer's power cord.
Wait fifteen seconds.
Attach the computer's power cord.
Wait five seconds, then press the power button to turn on the computer.
Note: For Intel-based Xserve computers that are not responding, you can shut down locally, or by using remote commands, or by pressing and holding the power button for five seconds.
Intel-based Macs: Resetting the System Management Controller (SMC)
Austin

Re: powerbook wont come back from sleep mode

I have the same problem. PB G4, 1.5 GHz, bought in '04. When I put it to sleep by closing screen or manually it will not wake up. I have rest PRAM and PMU. Still nothing. Also, it was shut-down unexpectedly a few times and wouldn't restart unless I reset the PMU. I don't have anything but power cable plugged in (I think the cable and battery are ok). Any suggestions?

Hmm... very interesting. Mine has been doing this as well and just recently. I thought it might have to do with me using the PCMCIA slot. That was the newest thing I've done when I noticed that when it goes to sleep, I can't wake it up unless I force it to shut down (hold the power button down) and then restart again.
It may be something else. Like an Apple Software Update. That's my only deduction, but I don't know which one. Unfortunately, I don't log what and when I update. But I am one of those who updates frequently and doesn't wait to hear what others' experiences are before I let the update run.
It is annoying. Thankfully, not happening when I have left important work on in the background. I am going to shut off the "sleep mode" in energy saver so as not to risk losing work.
So I, like you, will wait to see what other people say.
Mine is a "new" PowerBook from eBay and it wasn't exhibiting those signs before. Just recently, like last week. (When I started using the cardbus slot with a USB 2.0 card, so I could have more slots available on the left side... yes, I know the PowerBook already comes with USB 2.0). Model A1106 at 1.5GHz.

Satellite P200D-11R sound and graphics crash after waking up from sleep mode

Hi,
I am wondering if anyone here has had similar experiences to mine (below) or can offer any solutions.
I have upgraded my P200D-11R OS to Vista 64 Ultimate to take advantage of the extra performance. I also add that the BIOS has already been updated to version 1.4.
Well, everything works fine with the standard 2Gig of RAM which the laptop was supplied with originally, however, when I upgrade the RAM to 4Gig (2 x 2GB Samsung 667mHz modules), sound and graphics problems appear every time the machine is brought back from sleep mode.
The sound card makes a very laud fuzzy noise every time it wants to play a sound and the graphics produce lots of horizontal lines on the screen. I then just have to restart the machine which means loosing all my unsaved work.
Everything works fine as long as the machine does not enter sleep mode. I have currently disabled the sleep mode to prevent the machine from entering it but I am finding life very hard without it.
I am very surprised and also disappointed at the fact that Toshiba did not test these machines with Vista 64 Ultimate and 4Gig of RAM!
Extra info:
The memory is the same Samsung type as the 1Gig modules supplied by Toshiba originally with the machine, and the part number Toshiba recommends.
I have tried installing other (more recent) device drivers by Realtek and ATI without any improvements.
The memory modules pass all tests and are not defective. They have also been tested on my friends Dell notebook with no problems even in sleep mode.
I have installed my friends Dell 2Gig memory modules in my P200D and they too produce exactly the same results with post-sleep crashes.
My thoughts are that this must be another BIOS issue unless anyone can shed some light on the issue from another angle.
Please help! Many thanks in advance.

Hi Sascha
Since you are running a Vista 32bit version, the upper limit of the memory recocnised by the machine is 3.2gb which is the maximum a 32bit operating system can address and use. The diffrence here is that I also upgraded my OS to Vista Ultimate 64bit to get yet better performance out of the 64bit dual AMD processor.
3.2gb of RAM on 32bit OS does not necessarily increase the performance. However, it keeps the performance stable when you open many more programs at the same time since the machine has more RAM to play with before staring to use the much slower hard drive as operating memory (Page File), to keep all thoes open programs running.
A 64bit OS such as Vista Ultimate 64, recognises the whole 4gb of RAM and much more (for instance, 8gb with 2 x 4gb RAM modules). The 64bit OS itself would generally consume more RAM to start with, however, with 4gb I found the general performance to be much better. Going back to the problem however, my P200D-11R with Ultimate 64 and 4gb RAM refuses to wake up from sleep mode gracefully and the graphics and sound crash every time, forcing me to restart.
My feelings at present is that eventhough your machine may be slightly different, I bet if you upgrade your OS to 64bit, the machine will start recognising all of the 4gb of RAM and post-sleep crashes will start to appear!

Short flickering when the notebook wakes up from sleep mode MacBook Pro Late 2013

Hello everyone!
I have a question concerning the display of my new MacBook Pro with retina display (late 2013).
Sometimes when opening the lid when the notebook wakes up from sleep mode, the display is flickering for like two seconds. Then everything is normal again.
This specially occurs when the lid has been closed for a longer time. It makes no difference if the power adapter is plugged in or not.
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Hello!
I have the same problem with my late 2012 MacBook Pro Retina. The constant flickering after being awoken from sleep was a minor annoyance for me so I contacted Apple Support.
I shall explain what I have done thus far, and I recommend you follow the same steps as I did to tick off possible causes:
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I then ran (just to be certain) the Apple Hardware Test (http://support.apple.com/kb/ht1509). All seemed to be OK. So I reinstalled OS X and still the issue remained.
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It was then a Senior Apple Support person set up an appointment to have my MacBook looked at and possibly repaired (it could be a minor wire causing the problem).
That is the point I am at now, so for my case it seems like a minor hardware problem. If your case is as similar as mine I recommend making an appointment with them to run more sophisticated hardware tests that your own MacBook would not run.
I will comment again when my issue is completely resolved for those who come across this Discussion in the future.
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Hey my air's screen is mess when it comes back from sleep. It is full of horizontal colorful lines. However, it becomes ok when I restart it. What's wrong with it?

Hey my air's screen is mess when it comes back from sleep. It is full of horizontal colorful lines. However, it becomes ok when I restart it. What's wrong with it?

Resetting PRAM may help.
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I would add the mouse to bluetooth favorites in System Preferences > bluetooth > Highlight mouse on the left > click gear icon below this list > click "show more info" if not already checked > click the gear icon again and "add to favorites".
http://support.apple.com/kb/TA21371
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Regards,
Captfred
Message was edited by: captfred

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Hello,
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Hello
>Currently I've turned off sleep mode altogether. I've also reset the BIOS settings from the boot menu but it hasn't fixed the problem
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Furthermore it would be interesting to know who says that Crucial memory is compatible Maybe its compatible to other Toshiba notebooks but fact is you have problems after waking from sleep mode and this happens only with Crucial memory and not with preinstalled modules.
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Joel, thanks for your reply. I've followed your instructions, and the problem persists. I assume by reset, you mean reset to factory settings. No. It has been rebooted, and powered off/on several times since the OS update. I have no idea whether there are any apps that use WIFI only. How would I know what each app may require?
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Satellite U400 wont turn on & when on wont come back from sleep mode

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