Dear Mac Geniuses<br>On the subject mac which display port ADC or DVI is the first one by default. I don't have a mac display with adc, rather I have only a CRT with VGA connection. I am using DVI-VGA adapter to connect this G4 to my CRT and getting no display. <br>Q1. Which one is first ADC or DVI<br>Q2. Can I force mac to use DVI first<br>Q3. Should I just buy ADC to VGA adapter :(<br>Q4. Instead of hearing the usual Mac startup sound I hear a different sound note. Like a beep with a lot of Bass. Is my mac OK?<br><br>Cheers Guys!<br><br><P ID="edit"><FONT SIZE=-1><EM>Edited by seemaab on 04/04/06 08:43 PM (server time).</EM></FONT></P>
I think the reason you're getting no video is that the computer is not starting up, not your video connection, what you described should work.<br><br>The beep usually is for when you update the firmware. Does the power button flash too? It should not be there under normal use. Make sure the battery has around 3.6 DC volts with the computer unplugged. If so pull the battery, hit the power button, and let the computer sit unplugged for about an hour.<br><br>My guess is there is something wrong with the Boot ROM on the logic board, if so it can't be fixed without replacing the board.<br><br>
Loc: Hampstead, MD, USA
What reboot said, and also pop the case open and reseat any and all expansion cards, including the video card.<br><br>The battery is a good cheap place to start, I've seen macs go bonkers from a low battery that was corrupting PRAM. Stuff that you'd never think of a low battery doing.<br><br>
Hey I'm an F'n Jerk!® twitter.com/SgtBaxter facebook.com/Bryan.Eckert
I gather from what Reboot said <br>It does not matter if I am using ADC or DVI, any of the two should work.<br>The Power Button flashes occasionally as if to show hard disk activity. I shall try the battery thing. Thanks a lot friends.<br><br>On the back panel ADC is numbered as 1 and DVI as 2. I am baffled. Am I connecting the monitor to the right connector!!!!<br><br><P ID="edit"><FONT SIZE=-1><EM>Edited by seemaab on 04/05/06 07:39 AM (server time).</EM></FONT></P>
<blockquote><font size=1>In reply to:</font><hr><p>The Power Button flashes occasionally as if to show hard disk activity.<p><hr></blockquote><p>The power button does not flash with disk activity, you have a hardware problem. Try the battery, but don't put a lot of hope into that either.<br><br>
The battery didn't solve the issue. Where should I look for a new logic board for this G4 MDD 1.25GHz DP/256M/ DDR@333 /80Gig/Combo/MDM; Model No. M8570 EMC No. 1914 . I don't know where to look for the logic boards 'Product Number' either. It says something like 630T4505/630-4496 on a sticker on the logic board near the edge. I truly appreciate your help guys. Thanks<br><br><P ID="edit"><FONT SIZE=-1><EM>Edited by seemaab on 04/05/06 07:14 PM (server time).</EM></FONT></P>
I have no place special to recommend. Do a Google search using mdd logic board for the search term. There are quite a few, you'll have to call to get pricing and check stock. Make sure they have a return policy, usually a 15% restock charge, in case it's actually the processor card and not the logic board. My guess would be the logic board as that's where the boot ROM is, but theses things break in mysterious ways sometimes. I know of no sure way to check which it is unfortunately.<br><br>
Loc: The Wizard's Balcony
Before you do that, try starting up holding [command]-[option/alt]-o-f<br><br>if you get to a text prompt, type<br><br>reset-nvram [return]<br><br>reset-all [return]<br><br>hopefully the machine will reboot and start up normally. Let us know if this works.<br><br>
Have you tried using different RAM in your Mac? Many times, that's the culprit. Even if you do end up having to get a new logic board, it wouldn't be a bad idea to get a half-gig stick.<br><br>-- Charlie Alpha Roger Yankee Whiskey
Command+Option+o+f didn't work for me. I have not been lucky! I tried but failed to get any display at all. A new logic board seems inevitable. <br><br>Hmmm...!!! That might do the trick. I am feeling a bit guilty by not having mentioned the fact that I am using PC2100 DDR 128MB RAM module; whereas the required spec is PC2700 DDR. Thanks an ocean for the tip mate.<P ID="edit"><FONT SIZE=-1><EM>Edited by seemaab on 04/06/06 07:26 PM (server time).</EM></FONT></P>
Xplain's use of MacNews, AppleCentral and AppleExpo are not affiliated with Apple, Inc. MacTech is a registered trademark of Xplain Corporation. AppleCentral, MacNews, Xplain, "The journal of Apple technology", Apple Expo, Explain It, MacDev, MacDev-1, THINK Reference, NetProfessional, MacTech Central, MacTech Domains, MacForge, and the MacTutorMan are trademarks or service marks of Xplain Corp. Sprocket is a registered trademark of eSprocket Corp. Other trademarks and copyrights appearing in this printing or software remain the property of their respective holders.
All contents are Copyright 1984-2010 by Xplain Corporation. All rights reserved. Theme designed by Icreon.