New To Mac-Forums?

Welcome to our community! Join the discussion today by registering your FREE account. If you have any problems with the registration process, please contact us!

Get your questions answered by community gurus Advice and insight from world-class Apple enthusiasts Exclusive access to members-only contests, giveaways and deals

Join today!

 
Start a Discussion
 

Mac-Forums Brief

Subscribe to Mac-Forums Brief to receive special offers from Mac-Forums partners and sponsors

Join the conversation RSS
Other Hardware and Peripherals Other Apple systems and peripherals discussion.

Connecting HDTV to PowerMac G4 - Works, then doesn't?


Post Reply New Thread Subscribe

 
Thread Tools
phase5

 
Member Since: May 05, 2008
Posts: 6
phase5 is on a distinguished road

phase5 is offline
Background information from my system profile, the question follows:

OS 10.5.5
______________________________________________
Model Name: Power Mac G4
Model Identifier: PowerMac3,5
Processor Name: PowerPC 60? (2.1)
Processor Speed: 1.73 GHz
Number Of CPUs: 2
L2 Cache (per CPU): 1 MB
Memory: 1.5 GB
Bus Speed: 133 MHz
Boot ROM Version: 4.2.5f1
______________________________________________
ATI Radeon 7500:

Chipset Model: ATY,RV200
Type: Display
Bus: AGP
Slot: SLOT-1
VRAM (Total): 32 MB
Vendor: ATI (0x1002)
Device ID: 0x5157
Revision ID: 0x0000
ROM Revision: 113-91701-222

Displays:
VA1912wSERIES:
Resolution: 1440 x 900 @ 60 Hz
Depth: 32-bit Color
Core Image: Software
Main Display: Yes
Mirror: Off
Online: Yes
Quartz Extreme: Supported

Display Connector:
Status: No display connected
_____________________________________________

I have a Radeon ATI Video Card. The VGA output is connected to a 19" Viewsonic VA1912w screen. Works well. I'm trying to attach the ADC port to a HDMI port on my Sony Bravia KDL-40V4000.

I obtained a Belkin Apple Monitor Adapter - ADC to DVI - and a DVI to HDMI cable. Everything connected properly. No problems.

With both screens attached and powered on I power on the G4. The grey "boot up" screen with the Apple logo and spinning wheel appears on the HDTV screen, meaning the Mac has found it and is using it. While this is happening the Viewsonic is grey.

Then both screens go black, the Viewsonic goes blue, then puts up an old desktop picture, while the HDTV remains black. And that's all that happens.

I have to disconnect the HDMI cable from the HDTV, power down the Mac, then power on the Mac again to get it back on the Viewsonic screen.

I've tried adjusting the display settings (1360 x 768 60Hz and others etc), and frequencies, before powering down and trying it all again, in case such settings effect the HDTV, all to no avail.

Can anyone tell me what's happening? Why the Mac finds the HDTV during bootup, but then loses it, while it finds the Viewsonic, but won't complete the startup sequence. I though OSX would just autodetect the HDTV.

Many Thanks in advance.
QUOTE Thanks
bobtomay

 
bobtomay's Avatar
 
Member Since: Dec 22, 2006
Location: Texas, where else?
Posts: 25,185
bobtomay has a reputation beyond reputebobtomay has a reputation beyond reputebobtomay has a reputation beyond reputebobtomay has a reputation beyond reputebobtomay has a reputation beyond reputebobtomay has a reputation beyond reputebobtomay has a reputation beyond reputebobtomay has a reputation beyond reputebobtomay has a reputation beyond reputebobtomay has a reputation beyond reputebobtomay has a reputation beyond repute
Mac Specs: 15" MBP 2.33 C2D 256 4GB, MBA 13" i7 1.8, MB 2.0 2GB, Nano 4th, 3GS, iPad 1

bobtomay is offline
Unfortunately, the ADC port does not provide enough power to run today's HDTV's. The primary reason it was discontinued.

I cannot be held responsible for the things that come out of my mouth.
In the Windows world, most everything folks don't understand is called a virus.
QUOTE Thanks
phase5

 
Member Since: May 05, 2008
Posts: 6
phase5 is on a distinguished road

phase5 is offline
Quote:
Originally Posted by bobtomay View Post
Unfortunately, the ADC port does not provide enough power to run today's HDTV's. The primary reason it was discontinued.
Well, that's disappointing to learn.

So why does it manage to do it for that brief period during bootup?

Would I be correct if I assume that doesn't require much power?

Just trying to fill in the blanks.
QUOTE Thanks
bobtomay

 
bobtomay's Avatar
 
Member Since: Dec 22, 2006
Location: Texas, where else?
Posts: 25,185
bobtomay has a reputation beyond reputebobtomay has a reputation beyond reputebobtomay has a reputation beyond reputebobtomay has a reputation beyond reputebobtomay has a reputation beyond reputebobtomay has a reputation beyond reputebobtomay has a reputation beyond reputebobtomay has a reputation beyond reputebobtomay has a reputation beyond reputebobtomay has a reputation beyond reputebobtomay has a reputation beyond repute
Mac Specs: 15" MBP 2.33 C2D 256 4GB, MBA 13" i7 1.8, MB 2.0 2GB, Nano 4th, 3GS, iPad 1

bobtomay is offline
Am not that technically knowledgeable to provide specifics.

My best guess would be that initially it's loading only a minimal set of drivers similar to every Win & Linux box during the boot process.

I cannot be held responsible for the things that come out of my mouth.
In the Windows world, most everything folks don't understand is called a virus.
QUOTE Thanks
phase5

 
Member Since: May 05, 2008
Posts: 6
phase5 is on a distinguished road

phase5 is offline
Quote:
Originally Posted by bobtomay View Post
Am not that technically knowledgeable to provide specifics.

My best guess would be that initially it's loading only a minimal set of drivers similar to every Win & Linux box during the boot process.
Very much appreciate the feedback. And it does seem to explain my problem.

Anyway, just to find out I moved the Viewsonic closer to the mac and attached it to the ADC port using the adaptor and a DVI cable, (which was supplied withthe screen but about 3ft to short for my needs and the old VGA was already in place), and used some spare VGA cables to hook up the HDTV, which had a PC port.

And it all worked.

So at least I know the video cards OK, and it does seem to confirm that the ADC port connected via adaptor to a HDTV HDMI port can't run a HDTV.

So, a cautionary tale for anyone else trying what I did with an older Mac and uisng an ADC connector/adaptor to HDMi to HDTV.
QUOTE Thanks

Post Reply New Thread Subscribe


« Hard drive and Time Machine? | Canon i960 printer problems with iMac »
Thread Tools

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off
Forum Jump

Similar Threads
Thread
Thread Starter
Forum
Replies
Last Post
PowerMac and Quad owners ( post your spec and Picture of your PowerMac) 34skyline Apple Desktops 13 03-09-2006 12:53 AM
PowerMac Core Duo knemonic Apple Rumors and Reports 3 01-13-2006 03:25 AM

All times are GMT -4. The time now is 08:33 PM.

Powered by vBulletin
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
X

Welcome to Mac-Forums.com

Create your username to jump into the discussion!

New members like you have made this community the ultimate source for your Mac since 2003!


(4 digit year)

Already a member?