Monitor goes blue on startup

Yesterday we had a power failure. All our computers came back fine, except one - MINE! When I went to restart, after saying "Starting Mac OS X", my monitor goes blue. First I ran Apple Hardware Test and it states, "no hardware problems detected". I was told to start up from the cd/dvd for Tiger and then run Repair Permissions from Disk Utility. I held down the "c" key and started from the cd/dvd for Tiger and it took me through installation. After performing the installation, I was prompted to re-start and it did the same thing (blue monitor). Any ideas? Please help!!!
G4 Mac OS X (10.4)

Many Macs, especially G4s, will not boot after a power failure. The solution is to reset the PMU. In your case it's trying to boot but has a problem.
Try a PMU reset. See Mac PRAM, NVRAM, CUDA/PMU & Battery Tutorial
When you are troubleshooting a Mac, disconnect all external devices except the kbd, mouse & monitor.
Cheers, Tom

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My mac won't recognize an external monitor. The screen Goes Blue Once, then goes blue again and the second monitor just turns off. I am using an HDMI adapter to a visio TV. I also have my xbox on the tv. Can anyone Help??

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Lol, figured out the first part. Just for those who may be searching, when you click on the Display Preferences, and click on the arraingment tab... it not only shows where your two screens will be displayed, but the WHITE BAR at the top of one screen is the dock/toolbar. Click and hold to grab this and just slide it over to the screen you'd like it to be on.
You have to release it IN the screen box, not on top of it... and it should pop right over to the new (or old) screen. At any rate, you can put the dock on either (or any) screen that you prefer.
I am thinking of ordering more of these. Lol. 3 monitor setup seems like it would be crazy good.
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Hello,
I have a 2005 Mac Mini PPC OS 10.4.11. This is the first problem I've had since purchasing the computer. This problem popped up out of nowhere. The screen goes black during startup just after I login into my account. I can hear the hard drive spin like it is finishing the startup process. The monitor power button blinks green.
I'm using the digital video cable. I tried switching to the VGA cable but the screen then goes black before the login screen.
The computer will startup in Safe mode.
I've tried Disk Utility (repair disk and repair permissions), Techtool Pro, Drive Genius, ColorSync Utility, Reset Pram, installed latest OS updates, and even re-installed the System twice (once because I removed all the Extension files and then the computer would not startup at all).
I've also tried removing cache files, plist files, startup files, preference files, and some or all of extension files.
The only applications I have recently installed were QuickTime Pro and a .flv movie player; both about a week before this problem started. I tried to uninstall them but could not figure out how.
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Howdy. I have Had the same problem as you in regards to a ViewSonic Monitor and the Mac Mini. This is my post:
Monitor failure when switching resolutions
Using Displays with the Mac mini, Apr 1, 2008, Replies: 2
Running 10.5.2 on Mac Mini G4 1.42 Ghz with ATI Radeon 9200, 32 MB VRAM and ViewSonic VX922
When switching resolutions from 1280x1024 to 800x600 or vice versa, the monitor will cut to black and the power light on the monitor switches from solid green to flashing green. Only by combinations of powering down the mini and starting it up again with the monitor on or off will bring the monitor back to life. This problem makes it difficult to play World of Warcraft amongst other games. Any feedback in regards to this problem would be appreciated.
Thank You!
At this point, I am unable to switch Monitor resolutions. If I do, the monitor goes black, and I have to power everything down and wait a while before I can restart.
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Hi dianthus,
Sorry to hear about the issue after doing the update. Do you recall what the update was for? I have included a document regarding your issue.
Computer Starts but Monitor Remains Blank Windows 8:
http://h10025.www1.hp.com/ewfrf/wc/document?docname=c03518095&tmp_task=solveCategory&cc=us&dlc=en&la...
Give those step a try and let me know how it goes.
Thank you,
Please click “Accept as Solution ” if you feel my post solved your issue.
Click the “Kudos Thumbs Up" on the right to say “Thanks” for helping!
Thank you,
BHK6
I work on behalf of HP

HP Monitor going to sleep on start up

Ok, I've dealt with this problem long enough. I have an HP pavilion Elite, hpe 400f. Monitor worked great on it, then one night while I was checking my email, the picture went scrabled, and ever since I am faced with a "Monitor Going to sleep" error on start up. I can not get into my settings or do anything.
It does not work on other working monitors, I tried a whole new set of cables and when that did not help, I went and bought a new graphics card. That did no good either. But I can not install the drivers until I can actually see how to do it.
So what now? Nothing HP told me works. I am about to go crazy with this. I've begged HP to help me for a year off and on to no prevail.
Can you PLEASE help me?
This question was solved.
View Solution.

Hello @ddanh123,
Welcome to the HP Forums, I hope you enjoy your experience! To help you get the most out of the HP Forums I would like to direct your attention to the HP Forums Guide First Time Here? Learn How to Post and More.
I have read your post on how your monitor is faced with a "going to sleep" error message on startup, and I would be happy to assist you in this matter!
To restore the display on your desktop computer, I recommend following this document on Flat Panel Monitor Displays Message about No Signal, Signal out of Range, Sleep, or Power Save. This should help examine any possible steps that may have been missed.
If the issue persists, please call our technical support at 800-474-6836. If you live outside the US/Canada Region, please click the link below to get the support number for your region.
http://www8.hp.com/us/en/contact-hp/ww-phone-assist.html
I hope this helps!
Regards
MechPilot
I work on behalf of HP
Please click “Accept as Solution ” if you feel my post solved your issue, it will help others find the solution.
Click the “Kudos, Thumbs Up" on the right to say “Thanks” for helping!

Mini ppc w/ beachball problem and attached monitor going black frequently

I am seriously considering replacing this mini. I believe as the poster yesterday concluded that the hard drive in this mini is on the verge of quitting. Reference beachball problem everytime any entry is made. I completely reformatted with zero overwrite and slowness was not cured. Drive is only about 30% of capacity. The attached monitor goes black (not to sleep) this will happen while data is being entered periodically many times a day. The monitor behaves perfectly when connected to another mini with same cables. I think there may be a video output problem. This unit is in a high demand area for making appointments, so I think it is time to replace although I don't want to because of software issues. I looked at external firewire comments, but so far I can't find the drives that will support being start up drives and the video out problem is still an issue. I have also thought of bringing my PPC iMac flat screen from home and upgrading at home, but it is 4-5 years old and I don't want to do this again in 6 months. Any comments will be appreciated. Thanks

Have you run the Apple hardware test on it? Or if you have Applecare, the TechTools Deluxe test? To run the Apple hardware test, insert the first OS X disc that came with the system, which should say 'AHT Version x.x' in small print on the label. Reboot, holding the option key down. Choose the Apple hardware test, click the arrow pointing to the right, and follow directions. Does it identify any issues?
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Blue screen startup blues....

today i got the update software window so i installed the new updates of itunes, quicktime, and i think os10.4.11...
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You posted in 2009 area. Is that what you have?
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I would not put any faith or weight in TechTool Deluxe. if you like. upgrade to TechTool Pro 5.
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Screen goes blue

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Try using Disk Utility to repair your startup disk (hard drive) as shown in Dr.Smokes repair thread and see if that fixes it.
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Computer goes blue screen and comes back slow

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Hello, see how many of these you can answer...
See if the Disk is issuing any S.M.A.R.T errors in Disk Utility...
http://support.apple.com/kb/PH7029
Open Activity Monitor in Applications>Utilities, select All Processes & sort on CPU%, any indications there?
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Hi I have used my macbook pro with miniport to HDM, and it was working fine. Hadnt used it for a month and now when I connect the TV, the screen on the mac goes blue then back to the page but nothing comes up on the TV. Any ideas?

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Hello nothingissecret
Check out the article below for troubleshooting steps to resolve the issue. One would be to try a different cable or adapter to test with the television.
Apple computers: Troubleshooting issues with video on internal or external displays
http://support.apple.com/kb/ht1573
Thanks for using Apple Support Communities.
Regards,
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Message was edited by: Kirby Krieger

Monitor goes blue on startup

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