Single monitor goes black, 2 monitors work fine

I was using a friend's old PPC G5, and the Dell flat screen he has went black. Couldn't get it to stay on. So I hooked up another monitor in the 2nd monitor socket, and the 1st monitor unexpectedly came on. Both displays worked fine. But if I disconnected the 2nd monitor, or even just turned it off, the Dell went black again. Anyone have any ideas or suggestions about what's going on? The Mac is vintage 2006, running 10.4.11

The 2nd monitor is in a DVI port on the left. The 1st monitor is in the main display port on the right. My friend bought one of the last PPC G5 towers that Apple released, so the main port should also be DVI. I'll check it out to be sure.

Similar Messages

I turn my iMac on and it starts ok but after a minute the monitor goes black

I turn my iMac on and it starts ok but after a minute the monitor goes black, sometimes it comes back on sometimes it stays off, this has only happened since Apple replaced the hard drive.

Then, contact the Apple repair station that did the work.

Why did my external HD monitor go blank after working fine while hooked up to a new MacBook Pro?

Why did my external HD monitor go blank after working fine while hooked up to a new MacBook Pro? I have the Moshi adapter and HDMI hooked up to the 27 inch monitor. It was working fine and when I came back after lunch the monitor was blank but the MacBook Pro screen was fine. Could it be the adapter?

could be, try powering down the mac, with the exmonitor connected and see if it is recognized

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?
If you click the blue Apple, and about this mac, does the memory show what it should be? If there were a memory issue with the RAM strip, where you were only getting reduced memory, that could contribute to the issues you're seeing.
A number of people with slowing systems, with frequent beach balls, have used OnyX to clean up their system, which has made a performance difference. You can get it from http://www.titanium.free.fr/pgs2/english/download.html . Run the activities on the maintenance and cleaning tabs, which may require a reboot. Does that help?
One other thought, which is a stretch ... did you upgrade to 10.4.11 through the software update function or by installing the combo update? If by software update, you might want to download the combo version, and install it after you use OnyX. Repair permissions, install it, and repair permissions again, using Disk Utility. It's located at http://www.apple.com/downloads/macosx/apple/macosx_updates/macosx10411comboupdat eppc.html

My 27in LED monitor goes black, pops then comes back on

Brand new 27in LED monitor goes black, popping sound comes from speakers (I think) then comes back on. Plugged into my brand new Macbook Pro 2.2 GHz i7. Unplugged every thing and it still does it. Has most recent firmware. Just started after five days of ownership. Do I need to take it back to the Apple Store?
JBP

Had a second-hand TV once (I am cheap -- sue me). One day the screen went fritzy and the room smelled of ozone.
Ozone is a big clue with regards to electronic equipment.

My monitor goes black at different times

My screen goes black at varies times. Someiimes when I cut my computer on, the screen is black. Then other times it goes black after i have been on for a while. I know something is going bad but what?

, Hello and thanks for posting on the HP support forums. First question is. Have you tried the monitor on another system or plugged it into a notebook to see if you have the same issue. Normally if your monitor goes black when plugged into your computer and it is the problem with the computer. You will get a no signal message come up on the screen. If at all possible please post back with your full Model and Product number so I can pull the specs on the system and see what options it came with and find out the best way to search out what the problem may be. Here is a link to help you with this. HP Desktop PCs - How Do I Find My Model Number or Product Number? Here is another link that may be of help until you post back. HP and Compaq All-in-One and HP TouchSmart Desktop PCs - Screen is Blank after Starting the Computer Please let me know how things go and post back when you get a chance. Thanks again for the post and have a great day.

Sunray 3 in a kiosk - monitor goes black

After aprox. 10 minutes my monitor goes black a I need press a key to get login prompt back onto screen.
Screensaver in sunray server is turned off.
Monitor has not "screensaver" feature.

Sounds like this link can help you to disable screen blanking in X http://blogs.oracle.com/ThinkThin/entry/disabling_screen_blanking
Bjoern

Watching a DVD or QuickTime video, my second monitor goes black. Is there a fix for this?

While watching a DVD or a QuickTime video, my second monitor goes black. Is the a fix for this?

wanted to add my battery details:
Battery Information:
Model Information:
Serial Number:          W0037TD07E1LA
Manufacturer:          SMP
Device name:          bq20z451
Pack Lot Code:          0000
PCB Lot Code:          0000
Firmware Version:          0201
Hardware Revision:          000a
Cell Revision:          0165
Charge Information:
Charge remaining (mAh):          0
Fully charged:          No
Charging:          No
Full charge capacity (mAh):          5316
Health Information:
Cycle count:          73
Condition:          Normal
Battery Installed:          Yes
Amperage (mA):          0
Voltage (mV):          8563

HT3131 Clamshell mode not working even after powering off and reconnecting display; external monitor goes black anyway

After connecting an external monitor (non-Mac) to my MacBook (Mac OSX 10.6.6) w/proper adaptor, setting up to use clamshell mode as per manual, the external still goes black even after putting MacBook to sleep, disconnecting and reconnecting external and powering up again as suggested in Support. Displays are set to Mirror. Also, when I open Displays in System preferences, 2 different windows for Resolution settings appear. Where have I gone wrong? This monitor (Viewsonic) came with it's own software for setup on a Windows PC, but of course it is not being used on the MacBook.
Any help would be appreciated!

Hi Mike,
Yes I followed all the procedueres....except for waking the computer using a keyboard click. For obvious reasons one is just inclined to open the top of the MacBook to wake it when the external goes dark...I did that twice, until I realized that very last step was needed to 'wake' it. It worked. Something so simple, easy to overlook I guess.
I did leave the monitors mirrored, fyi, if I don't then all I can access from the external are the resolution settings. This Viewsonic comes pre-loaded with Windows software of it's own and doesn't quite behanve the way my previous external did, but I got it figured out.
Thanks for your response, tho!

Monitor goes black after apple logo startup

My family gave me a macbook pro 15 inch laptop. they bought it back in aug 2007. Everything has worked fine they told me until my sister had gotten into a small fender bender. But it was enough to send the laptop flying into some stuff in the back of the car, and dent the bottom of it. the problem is that the lap top starts up with gray screen and apple logo, then goes black, but the computer is still running. Also, if i hook it up to a external monitor, it works perfectly, as in it shows up on the external monitor. the dent is located on the botoom right hand corner if your looking at the computer head on. Also the computer gets hotter than usual. Any ideas on how to fix it? I'm a PC guy usually but would like to delve into macs also, so i would like to get this working. I'm running lepoard snow. Thats all i really know about it, any suggestions? I took it into the apple store and they said the logic board could be shorting out because of the aluminum hitting the logic board where the dent is. but if that was true, why would i get a display in the first place? any ideas.
Thank you for suggesting anyting, because it would help.

Welcome to Apple Discussions!
There are a couple of sites with teardown instructions:
http://www.ifixit.com/
http://www.powerbookmedic.com/
Both of these sites also have some troubleshooting tips.
If it were mine, I'd take it apart and straighten out the bent metal. Also check the internal cable connections--it's possible the flex cables to the display may need to be reseated. The connections to an external display are different from the connections to the built in display, so the external could work even if the internal one did not.
It actually sounds like it survived the crash pretty well since it still boots up and runs. The shock may have dislodged some cables, and you need to check and see if the fans are working. You can download a widget from the Apple site called "iStatPro" which will display fan speeds and temperatures.
Did you get the system discs? If so, you may be able to boot to the Apple Hardware Test. If you can, run the extended version and see if you get any error codes. Not sure if you can run it using an external monitor, but it may be worth a try.
Post back if you have any questions. Good luck!

Laptop monitor goes black after connection external vga monitor

Hey,
I have a Qosmio G50-10H, running windows 7 32-bit. After connecting an external monitor the internal laptop screen goes almost black. It's possible to see some elements on screen, but it's to dark grey to work on. It does not respond much to color or brightness adjustment (black to really dark grey). The main trouble is when disconnection the external monitor the internal monitor still is dark grey and still isn't responding much to adjustments. It's so dark on the brigthest adjustments that it is impossible to work on. I have downloaded latest driver for support, but still same problem.
Any suggestions?

Hi buddy,
That means the internal monitor is always dark grey even you start the notebook without external monitor?!
Well, in such cases it could be a LCD inverter malfunction. This part controls the backlight of LCD and if its defective, you can see a picture but its very dark/grey.
By the way: Do you notice the same behavior if you are in BIOS setup? So you can check if its Windows related problem or not.
In worst case you need help from an authorized service provider. They can check what the problem is exactly.

Monitor goes black

I have had this problem before and it had gone away. But now
its doing it again. Its hard to describe and I whish I could post a pic of it for people to see. But its as though the monitor is getting something but it isn't right. And sometimes its not black at all. sometimes there is just a line of pixels that have been stretched down the screen. Or there is a grayish mottled screen. Or just some gray areas in the lower corners. It works fine on an external monitor though. It doesn't seem to be the monitor. I'm hoping its the cable.

I would look into some other posts related to monitor issues on this forum. I suspect it could be loose/failing cables or a failed power inverter.

Display monitor goes black after iMovie 3 opens up

Please help if you can, I hope it's not the monitor!
Every other application (including FCP and FCPHD) is working great, no problems with displays or anything, but as soon as I open iMovie and I click on any window in Edit mode, the entire screen goes black.
I am using eMac 1.25 GHz G4 with 768 MB of RAM and I just recently upgraded operating system to Tiger 10.4.8 I believe and to the latest Quicktime.
Please advise. Thank you.

That was a new one.
Various "weird" behaviour is caused by a bad preferences file.
Quit iMovie.
In the Finder, go to:
Users:YourLoginName:Library:Preferences
Delete the file: com.apple.imovie3.plist
Try iMovie again.

HDX18T Monitor Goes Black

For the past week or so, I've had to move the power plug around to get the laptop to charge. I determined that it's not the cable, but is the internal part. Today, when I opened the lid to bring the laptop out of sleep mode, my desktop displayed for a second or two, and then went blank. I've re-started several times, removed the battery and held the power button, but it doesn't help. Originally, it would go blank as soon as Windows started to load, so I tried Safe Mode, with the same result. Now, when I turn on the laptop, I might see the HP logo and/or the blinking cursor, and then the screen goes black.
I hooked it up to an external monitor, which worked, until I tried to uninstall the display driver, in hopes that it would correct itself, now I don't get anything on the external monitor either.
I suspect that it must be the graphics card, but not sure. One other thing that happened occasionally, if I bumped the side of the laptop, near the HDMI and USB ports on the left side of the laptop, against something metal, the screen would go black for a split second. Seemed like an electric short.
Thank you for any help you can provide. I'm okay with replacing parts, although not my favorite. I did replace the keyboard with the lighted keyboard a year ago.

That's too bad that the lamps are gone, but here are some alternatives.
http://www.laptopscreen.com/English/currency/USD/laptop-part-number/HP-Compaq/HP%20HDX%20X18-1000EO/
http://cgi.ebay.com/18-4-LCD-Screen-Dual-Lamp-CCFL-Bulb-HP-HDX-X18-1114TX-/150610885160?pt=LH_Defaul...
http://www.ameytech.com/data/ebay/kanni007/images/ccfl/instructions/ccfl-installation-instructions1....
The new screen is probably the best way to go, but removing it from the bezel is a challenge, after the hinges are removed, the screen is still held in there with this double sides sticky tape. If you use a very hot hair drier, starting at one of the upper corners, the adhesive can be softened enough to begin prying the bezel away from the screen. It takes awhile for the hair dryer to soften the adhesive so give yourself lots of time for this procedure.
When the new screen is installed it's very difficult to get every last crumb of debris out from under the bezel, so keep this in mind.
Another option is to replace the bulbs, I tried this ounce on an old screen that I didn't care about and it did not go well. I could not separate the parts that were taped together without damaging them. This would be the least expensive way to go if you can remove the bulbs.
I am also assuming that it's the 1920 X 1080 screen with the dual lamp arrangement _ some of them used screen with lower resolution with one CCFL lamp. (Yours is probably the dual lamp assembly)
There is also a used complete screen assembly available on e-bay, but eventually it may succumb to you fate in a few days or a few years, there is no way of knowing.
The part number for the complete display assembly is 498166-001 and it is available from HP, but it's expensive.
http://h20141.www2.hp.com/Hpparts/Search_Results.aspx?mscssid=F747349FA1494EEDA36B3303FEC30A7A&Searc...
The other thing that I have not mentioned is that it may a faulty cable, perhaps the wires that supply the voltage to the inverter board have become internally frayed. This is a common occurrence, but usually this also effects the picture as well.
Here is the part number for the cable 496876-001. These can be found on e-bay and some of them are new.

I upgraded to Mavericks and my iMac monitor goes black randomly, but my attached cinema monitor stays active. I can fix it by putting it to sleep and waking it up again. But often it happens immediately after.

I have a 30in cinema display attached to my iMac and the iMac screen randomly goes black while the cinema stays active. I can put it to sleep and log back in which fixes it, but often it happens again immediately after. Sometimes it happens so quickly I can't even finishing logging in! I'd like to know if this is a Mavericks issue and I will roll my machine back. Thank you!

RocknOats
Wanted to update you on my situation with this.
So far 8 hours have gone by and I have not had a screen blackout.
FIRST I did the Hardware Test. TWICE on the extended test, the instructions on the KB Article explain. It took almost 3 hours, but while the test was running, both times, my computer screen did not go black.
I did get an error message, both times. Different each time. I looked up both of the error messages on discussion boards. Lots of conflicting info
One good thread said my first error was that my hard drive was bad and would probably fail.
The next error message I researched said that a fan was bad or needed replacement.
(information comes from other folks on discussion boards, not from Apple or technician)
Not sure what exactly those 2 error messages indicate but I followed a thread where someone found a solution by doing the following. So far it's worked.
After Hardware Test I did a shutdown and an SMC resest. Unplugged computer power source from wall and computer for about 10 minutes.
Finally after a restart I downloaded "SMC Fan Control" (CNET Downloads has a nice safe copy you can download)
There is a temperature monitor and from what I've read so far, keeping the CPU temperature under 50˚C is ideal. Making sure your fans and computer is in a well ventilated area/room too of course.
The SMC Fan Control helps you set your own speeds on the fans and so far everything has been going normal.

Single monitor goes black, 2 monitors work fine

Similar Messages

Maybe you are looking for