Its a Mac clone that was sold 4 to 2 yrs I have 2of them and both have the same problem can't get them on the screen and any help would b nice thank u.
Some Macintosh computers had difficulties with the video circuits if the internal battery voltage was too low. I do not know whether this could be the case with the Power Computing machines as well, but you may want to check the batteries anyway to begin with.
Jan
Hi there's only one battery and I changed it also pressed the cuda reset battery is 3.6 volts any other ideas ? Thank u
Your PowerTower Pro 225 shares the same architecture as the Power Mac 9600/200 & 233 MHz models, although your model's chassis has more expansion bays. Assuming that the OEM PCI graphics card hasn't been replaced, it's an ims (later "ixMicro") TwinTurbo with 8 MBs of VRAM. Over time and especially when sitting in storage, the gold-plated pins on the edge of the processor, memory, and PCI cards can become oxidized and cause problems. Remove the cards and gently clean both sides of the pins with a soft white eraser. Be sure to blow off any residual rubber shavings before re-installing them. Now, if someone has replaced the original PCI graphics card with one from a PC, it won't function in a Mac or Mac clone. The card's ROM must be programmed with Mac code in order to function.
Hi I took out the 2 boards and cleaned them but no luck sorry didn't mention I don't get the apple chime at start up either would it help if changed the slots for the boards ?
What kind of monitor are you using?
Hi its a 14 in Mac screen... My box has both connections why do u think that's a problem ?
Just curious. It took some fiddling to get a flat panel widescreen monitor working with my 9600. That doesn't seem to be relevant t your situation, though.
Hi sorry was a bit frustrated and stopped playing with it can't get the screen up and running so can't change any settings and still no chime on start up so I don't know if pram is reset or not
Hi i changed the battery again but no luck still no chime on start up or when I tried to reset pram
Hi I haven't changed any cards while in my possession my video card has both connections so I bought an old Mac screen 14 in trying 2 locate an adaptor to plug in the other small connector ?? Is there something I have 2 do 2 switch screen selection
Helmut,
What happens if you connect headphones or external speakers? Can the startup sound be heard then? Otherwise, there could be a problem on the logic board (this may be merely audio-related, or something more fundamental).
Even if a startup sound cannot be heard, nor anything seen on the screen, does the hard drive appear to be active (clicking, as during a normal startup sequence) after the computer has been turned on?
Have you tried using a magnifying glass to inspect the video and logic boards inside the computer (looking for leaking/bulging/discoloured/cracked electronic components)? Leaking electrolytic capacitors can be the cause of various problems.
You indicated that it is a 14" Mac monitor. Normally, that would mean a DB-15 plug (with 15 pins in two rows). Under your Older Hardware topic (https://discussions.apple.com/thread/6856695), you mentioned that the plug only had 10 of 15 pins. It is not possible to say whether or not the ten pins are sufficient without knowing their exact positions. Please note that special sense codes were used in order to tell Macintosh computers the type of monitor connected (you may want to search for "Sense Lines" at https://developer.apple.com/legacy/library/navigation/ for further information).
Could you borrow an older (CRT) PC monitor with a VGA plug (HD-15/DE-15, with 15 pins in three rows) just for a test?
Jan
Hi plunged in head phones no luck cked all the boards and cleaned them they seem ok. Did a pin ck the ones that r missing r dead one's. tried my PC screen view sonic v a 2026w no luck
Oh 4got. Hard drive seems 2 start ok I hear it clicking normally
Hi just a thought I just remembered I have an old 7200 Mac could I hook up the hard drive there and use that as the home ?? Thanks
Hello again,
https://support.apple.com/kb/SP343
https://support.apple.com/kb/SP345
https://support.apple.com/kb/sp347
The Power Macintosh 7200 models had a SCSI hard drive, and they were equipped with an external SCSI port. So, you could connect a SCSI hard drive from your PowerTower Pro 225 to a 7200, either internally or externally.
If you wish to just replace the 7200 internal hard drive with the one from the PowerTower Pro (SCSI ID 0), you would have to use an appropriate system CD or floppy disk as a startup disc/disk, unless the PowerTower Pro hard drive contains a universal operating system version that works with the 7200.
Otherwise, you could add the PowerTower Pro hard drive to the SCSI chain (internally or externally). If so, the SCSI ID of that hard drive must be changed to a suitable value. A purely external solution would require a powered enclosure with an ID switch, but at least a temporary setup internally should not be too difficult to arrange (ID change via jumpers).
https://support.apple.com/kb/ta27743
Jan
hi i have a powertowerpro 225 built in1996 its been in storage for 12 yrs was working fine then it boots up but no image on screen help thank u
