i have an apple powerbook g4... it heats up on the bottom when i have it on my lap... how can i stop this?
481892
get a cooling pad, it's a base you put your laptop on with fans in it that keeps it cool.  You can get them anywhere, and they're relatively decent priced.  I got one at the local computer store for $40
693328
My daughter just finished year three on her Mac Powerbook G4 and we're expecting it to make it through for one more year. She'll probably upgrade when she goes to medical school. Just make sure you get Apple Care and replacement-cost insurance. And don't forget to back up!
174897
1.\nPower down all nonessential functions. Switch it off if you're not using it. Many business travelers already know that you don't want to take the DVD player for a spin on the plane, and that every time you hit "save" it can set the hard-drive whirring, which devours even more power. "But users often also forget to turn off their wireless card when they are no longer using it but are still using their computer," notes Mike Fuller, executive vice president of PC Laptops, a Sandy, Utah, laptop manufacturer. "When the wireless card is on, it still continually searches for networks." In Windows XP, click on "Power Options" in your control panel. It allows you to reduce the power consumption of any number of your computer devices or of your entire system.\n \n2.\nStay out of extreme temperatures. The technology that powers you battery isn't terribly complicated. But it's important to understand a little bit about the chemistry behind batteries, and how that can affect your work. Specifically, temperatures can affect the performance of your battery. It's best to use (and especially charge) your batteries at room temperatures. Extreme conditions can drain your battery quickly. Also, avoid partial charges and use the battery until it is dead. Battery experts liken partial charges — and discharges — to eating a cup of lard every day. It significantly shortens your battery's life. Considering that a lithium-ion battery can explode if it's improperly used, it could also shorten your life.\n \n3.\nLet your laptop do the saving. Not every computing device handles a power source in the same way. Some of the more sophisticated laptops, which are designed with business travelers in mind, are misers when it comes to using power. And that's a good thing — if you can remember to take advantage of it. "Most users make the mistake of simply not choosing to use a product's built-in ability to conserve battery life," says Dan Coffman, a senior product manager for PC manufacturer ViewSonic. How do you harness your PC's built-in ability to save? Consult your user manual. Often, calibrating your laptop is as easy as double-clicking on the battery icon in the toolbar.\n \n4.\nAlways, always carry a spare device that uses batteries. How obvious is that? Well, if you're trying to keep under the onerous new airline weight-limits, it isn't. But as Rick Thompson, director of engineering at Valence Technology in Austin, Texas, observes, "the availability of 'free' power outside of your hotel room is not predictable." That's a nice way of saying it. In fact, I sometimes think airport terminals, car-rental facilities and hotels try to hide the power outlets from us to keep us from accessing their free power. Thompson recommends a system that can simultaneously charge a second portable device such as a cell phone or PDA, allowing you to multitask your battery operations.
644105
I use my Hp laptop on my lap and have for the last year and never had a problem with it. It sometimes gets a little warm you don't want to do it if your bare skinned. I was told it is best to put a small lap table under it. Like something you would use for eating breakfast in bed.
1123190
Laptops are thin, naturally. And laptops contain ICs which require much energy (the CPU, graphics processor chip, etc) and, being so thin, the heat geenrated by them appears on the outside of the laptop. If on the bottom, your lap is likely to get warm as the laptop heats up. \n\nA cooler pad is a device (which can work in any of several ways) which either dissipates the heat, or provides a way for it dissipate. some are props for lifting the bottom o fthe laptop allowing more air flow and so loweing the heat reaching the bottom of the laptop. \n\nAlternatively, a pad could include a fan to increase the rate of heat removal. \n\nNote that laptops which get hot are getting the energy for the heating from the battery,  and so reducing the battery life. Hot laptops are battery charge eating laptops, and to be avoided by those who need to have a laptop running, away from an energy source, for an extended time. \n\nUnfortunately, it's generally true that the faster a laptop runs (the clock rate claimed for the CPU uses is often a good measure) the more it heats up. This is one of the reasons the Intel Pentium 4 CPUs never reached their planned speeds. They couldn't find a way to keep the power draw, and so the heat emitted, down. They had to change the way they were designing and building their CPUs, and haven't quite caught up with their competitors yet. One of the things they're doing is to build in to the CPU ways to shut down (or slow down) portions of the chip whcih needn't run so fast just now. Not easy to do, really. Other CPU makers (and video processor chip makers as well) are doing similar things with their chips. One of the tricks is lowering the power supply voltage at which the chips work. Years ago, CPU ships reguired 5 volts DC (and some even required some power at 12 volts). Today's CPUs run on a volt or less. It reduces the power required and so the heat generated. \n\nIt's what's called a race condition in other engineering situations.
538599
It sounds like it is staying in Standby Mode.\nRight Click Desktop> Screen Saver> Power>   System Stanby and Hibernates to (NEVER).\n\nGo to to system Setup. Restart your system and press F2.\nand set power Management.\nHarry
155427
Hello. The most common reason for freezing is memory related. In other words what programs you have running etc is utilizing most of or requiring more memory than you have available. Reduce the number of programs in your start up menu to only those absolutley needed. Try not to have too many things running or open at the same time. Or, have more memory installed. Your usage style may just be exceeding the memeory your laptop has - even with all of these things\nabove take care of. It can be other things but this is the usual cause. Freezing is the laptop's way of saying: I cannot do what you are asking ...Like trying to turn on all of the electric things in your home all at once....the circuit breaker blows...you reset it ...then turn everything in the house on again...the same thing will happen. Use a few things only at any time or upgrade your laptop's ability to handle more at once! I hope this is of assistance. Also overheating (due to utilizing the laptop in scuh a manner that it's vents are blocked -like on your blanket in bed or similiar) is the second most common reason for this....If it feels really hot then this could be the problem. Laptops are best used on a table where it can vent (cool itself) rather than on a "lap" ..... they should have called them something else! Take care & good luck.
646098
if u hav a AGP graphics card then it could be heating up... happened wid me... or there can also be a virus attack.. the rest a hardware prob in monitor or curcuit prob possible.
979221
There may be several reasons why this would happen, I have a laptop and it does this when it heats up. I had a server running in my office which did this because of a bad hard disk. So the bottom line is you'll have to check for all the following: \n\n1. Heating Problem,\n2. Bad HDD,\n3. RAM Issues,\n4. Software Issues,\n5. Viruses.\n\nBy the way if you have done any new upgrades to the HW or software then that might also be a cause for such a problem.\n\nBest regards
734635
I recently bought a refubrished Apple Powerbook G4. I love it. It have a 15 inch screen. Supports 2gb memory. Has a independent 64mb graphics card. 80gb HD.Great battery life I would suggest the new MacBook which runs windows+mac.
780713
The same thing happened to me on my laptop.\n\nIt is possible you are running out of resources.  However the below is what happened to me.\n\nWhat was happening is that the programs you are using are cpu intensive.  This causes the cpu to heat up.  The most likely reason for this is that the fan on your cpu is not making good contact with the cpu itself.  This means that it does not draw off enough heat. When the cpu gets hot enough it will shut the computer down.\n\nYou can get "speedfan" (goggle it) which will tell you how hot your cpu is running.  However unless you know what temperature it will scram (or shutdown) at I don't know how much this will help you.  Basically get someone to reattach the fan.  They need to get some kind of heatsink compound to attach it.
659191
I have a similar problem... I have an old apple power book, and I popped all the buttons out, and cleaned underneath of them. if you want to take the lap top apart, clean out the rubber buttons underneath it. otherwise spray it with compressed air. that worked for me, but you may not be wanting to go that far... or you could take it to the shop and let them do it.
993151
There have been many many complaints about Toshiba laptops overheating. It's rumored that Toshiba used a desktop system board and it causes the laptop to overheat and shut down. \n\nMake sure it's properly ventilated or buy a cooling board or just do a search on "toshiba laptop overheat", you will find lots of info.\n\nHere's the info for you.\nhttp://news.com.com/Overheating+Intel+parts+threaten+Toshiba+laptops/2100-1040_3-238117.html
1088447
If the computer is under warranty,I would contact the company that made it.If warranty is out and this is a problem that has just recently occured then I would either take it to a computer technician or If you know anything about going inside one,I would say your power supply is on the blink and needs to be replace.If the heat is coming from the general area of the power supply,I would most deffinatly say this is the problem.\n\nGood luck with that computer
362708
If it is a brand new laptop or if it is under warranty then the easiest solution is to take it back.  \n\nHowever, if you fell it is overheatingcheck to see if all the vents are clear, if not try unblocking them.  Aquick blast of air or vacum cleaner should do the trick.  If still overheating then the CPU cooler fan will be faulty.  Usually when CPU overheats it shuts down.  Not freezes.\n\nFaulty memory seems like a culprit.  Did you change anything  recently? Install software etc??\n\nCheck to see from the Windows Task Manager what processes and programs are running?  Stop unnecessary ones and monitor CPU memory usage.\n\nUse or run Anti Virus program and program like SpyBot or AdAware to see what they report.  whether there are malicious programs running without your knowledge.
11591
Check if the hardware is even Mac OS compatible. I have a Powerbook and lots of hardware does not run on Mac, just because software developers don't think Mac users are that important.\n\nSo make sure it should run on Mac OS (usually on the side of the box). If it does, check the manufactures' website for software to get it running.
692516
Yes, I would say it is an overheating problem. Because it is a laptop I would recommend you to take it to a repair shop. \n\nThe laptop turns off to protect the cpu.\nWhen trying to turn it back on, it will turn it self immediately back off, because of the safety feature.\nIf it ever happens again this time wait 30 min berfore trying to switch it on again. I bet this time it will turn back on with no problems, because after 30min the temp. will be at an acceptable temperature.