No video, Mac PPC 7200/120

[thevdoguy]

Computer does turn on. I've installed a new PRAM battery, swapped harddrive from a working 7200, and still now video display. Wont start up from CD or floppy (disk tools).
What next?

 

[jimbopalmer]

you could put in a PCI video card for a mac, if you thought it was bad onboard Video RAM.

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=25449&item=2301193526

I confess I would buy a 7500/7600/7300 (I got one for $21) and move the disk and memory from the 7200

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=4607&item=2087535996

I tried to remain child-like, all I acheived was childish.

 

[jimbopalmer]

Yep! 7500/7600/7300 are not bad boxes, and even with shipping you can get them under $60 I tried to remain child-like, all I acheived was childish.

 

[PTmon]

I'm having the exact same problem with an older iMac. I tried everything, it's now in the shop. I'll let you know what they diagnose.
PT

http://mahon.homeip.net/remember

 

[jimbopalmer]

Any chance the battery is dead? they are about $12 at Radio shack I tried to remain child-like, all I acheived was childish.

 

[thevdoguy]

From what I have read about in the service manuals, it looks like I have a bad Logic board (motherboard, as PC'ers call it). I ordered a new logic board (7500) to replace it. I'll let everyone know who's interested what the outcome is. PTmon, I'm currious to what the shop said about yours. Post again when you find out.

 

[jimbopalmer]

the video on the 7200 has one meg soldered in, and can take 1 or 3 meg added

the video on the 7500 has no RAM sodered in and takes 2 or 4 meg of RAM, you almost always want 1 meg more ram in the 7500 than the 7200 I tried to remain child-like, all I acheived was childish.

 

[PTmon]

Finally heard from the local repair shop. Bad mainboard. $270 later I have a functioning iMac. Sounds like you bought the right part
PT

http://mahon.homeip.net/remember