My Desktop Mac Duo will not start up.

My Desktop Mac Duo will not start up. I keep getting a grey screen with the 'no entry' symbol. It can't find the srtat up disk. I cannot get it to start from the original system software CD either.

Disconnect all wired peripherals except keyboard, mouse, and monitor, whichever is applicable. Remove any aftermarket expansion cards. Check the installation DVD for dirt or scratches. Run a cleaning disc through the optical drive. Try again to boot from the DVD. If you can't, you have a hardware fault.

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See if these support articles help:
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A really weird thing happened to my MacPro 1,1. It has been working fine for the last 5 years until today when I was running Parallels and suddenly the screen got those thin, horizontal, wavy, purple lines all over the place and cursor turned into a beachball. I tried to Force Quit Parallels but it didn't work. I had to hold power button to force the computer to shut down.
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I found your thread very helpful. I have a 2009 mac pro 3,1 that seems to be doing similar things. It was working fine then occasionally the screen would flicker and then freeze the system. had to power off to get out of it. Now it won't boot. I get purple and white vertical lines and the apple with the pinwheel. the pinwheel stops after a while and thats it. i tried booting from the cd and get to the harware test but the screen is split left and right. really unreadable. i suspect the graphics card (geforce ) so i tried booting without the card installed. i believe it still did not complete the boot. my question is should i be able to boot without a graphics card installed? any thoughts or advice would be appreciated.
jim

Mac Pro will not start-up.

My Mac Pro will reach the start up screen: Apple logo spinning start up indicator. Then I see a blue screen then a gray screen followed by gray. The multi colored computer busy indicator will appear folloewd by nothing. Would the problem be a faulty processor? Any suggestions?

I spoke to soon...after installing the MAcOSX Snow Leopard software I restarted with no problem. Once I removed the dvd the computer froze! After a restart the drive refused to boot. This time a dark screen. I was able to restart via safe boot and currently downloading updates.

Power Mac G4 will not start up

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I would first replacve the internal PRAM memory battery. Check this site for battery part numbers and sources. https://sites.google.com/site/macpram/mac-pram-nvram-cuda-pmu-battery-tutorial Mac PRAM, NVRAM, CUDA/PMU & Battery Tutorial
Some things to try.
* Reset the PMU http://support.apple.com/kb/ht1939
* Resetting the Logic Board - Resetting the logic board can resolve many system problems. Whenever you have a unit that fails to power up, you should follow this procedure before replacing any modules.
1 Unplug the computer.
2 Press the Power On button on the front of the unit.
3 Open the side access panel.
4 Remove the battery from the logic board.
5 Wait at least 10 minutes before replacing the battery.
6 Make sure the battery is installed in the correct +/-
direction.
7 Reassemble the computer and test the unit.
Note:
This procedure resets the computer’s PRAM. Be sure to
check the computer’s time/date and other system parameter settings
* Resolve startup issues and perform disk maintenance with Disk Utility and fsck
http://docs.info.apple.com/article.html?artnum=106214
* Troubleshooting: My computer won't turn on
http://docs.info.apple.com/article.html?artnum=300552
* Power Mac G4: Computer Does Not Power On, No Fan Movement
http://docs.info.apple.com/article.html?artnum=95038
 Cheers, Tom

HP desktop crashed and will not start

My HP computer (P7-1268C) crashed and will not restart. After trying everything I can think of, I pressed the start button once more and the color went from blue to orange and then blank again. The computer did not overheat as it is not even warm. Please help.
-- Riley Huntley
This question was solved.
View Solution.

hello. I am not an expert but i will still try to help. first thing i would try is checking with a different monitor. If that does not work than i would create an ubuntu flashdrive. ubuntu is and free and open sorce os and is a good tempary fix if you need a computer fast. It is very easy to install onto a flash drive. ubuntu.com
it also sounds like if it isnt the monitor than its a virus.

My mac book will not start after installing yosemite

CCan somebody help me with this problem?

Hi karenfromherne,
If your MacBook will not power on I would suggest that you troubleshoot using the steps in this article -
Troubleshooting: My computer won't turn on
Thanks for using Apple Support Communities.
Best,
Brett L

Palm Desktop Quick install will not start and has no solution

When starting quick install, i get informed that 'an unidentified programme wants to access my PC' its the quick install .exe , however when i grant the programme safe i get informed that palm desktop quick install has stopped working and i will be notified if there is a solution.... which inevitably there is not! Any idea's?
Post relates to: Tungsten E2

barrybaillie,
These warnings sound like the Vista's UAC kicking in. If this is the case, you should know that Quick Install does not work in Vista.
The downloadable Desktop 6.2.2 for Vista has a replacement to Quick Install that does work - but the Desktop itself is truly terrible and loses many other functions (Expense, NotePad, VersaMail, colour-coded events, Birthdays and Anniversaries) that you may have come to expect from your Desktop.
If your current Desktop is otherwise working as expected, you should know that an alternative to Quick Install already exists on your machine and this does work on Vista. The easiest way to access it is to right-click the program you wish to install, then > Send to... > Palm Powered Handheld. This is a shortcut to the program instapp in the Palm folder.
An installation window will pop up (a UAC confirmation *may* pop up and can be dismissed) showing the chosen program ready for Hotsync. At this point you may also Add other programs/files. Hotsync when ready.
A further alternative that I understand works with Vista is the freeware Pilot Install ( http://www.freewarepalm.com/utilities/simplyinstall-pilotinstall.shtml ) and which bypasses Palm's software entirely.
Hope this helps!
Message Edited by Bazza on 09-17-2008 06:34 AM

Mac Pro will not start

Was using emails then suddenly the screen crashed restarted only to have apple logo and timer showing any help please

Are you getting screens like this?
If you are then your Mac is booting from either over the internet, first image, or from the built in Recovery HD partition on the drive. Both, either, are not a good sign for the health of your hard drive. For either to load automatically when you start your Mac means the hardware can't find a valid install of OS X on the internal drive. If you are getting the Online Internet version, that is where you will see a timer and the fist iomage I posted, means the internal drive is not functioning at all and can't evenm load from the built in Recovery HD partition.
From that Mac OS X Utilities screen open Disk Utility and see if the internal drive is even being seen.
It would be an entry similar to this, the top most entry on the left side.

My Desktop Mac Duo will not start up.

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