i disconnected the ribbon cable to the display followed by the microphone wiring and then took out the screws that hold the front bezel on the top two screws are covered by rubber bumpers which surprisingly hadn't turned to goo unlike the feet on the bottom of the machine i carefully unclip the clutch covers as the tabs that latch them on are equally likely to have become brittle then i could remove the screws holding the display to the bottom case and set it aside before i got into troubleshooting the screen i wanted to investigate a couple of things first i took out a pair of screws from the back that hold in a plastic cover which then exposed the third screw in that metal shield my suspicions were confirmed when i lifted it away this machine has a cpu upgrade card powerbook NUMBER_TOKEN series machines shipped with motorola NUMBER_TOKEN lc-NUMBER_TOKEN cpus at either NUMBER_TOKEN or NUMBER_TOKEN megahertz but they came on a removable daughter card which left open the possibility for future upgrades a fact that apple even advertised with a sticker every computer came with in NUMBER_TOKEN apple delivered on that promise by offering a power pc upgrade kit that included a NUMBER_TOKEN megahertz NUMBER_TOKENe processor and NUMBER_TOKEN megabytes of ram at first this upgrade was expensive priced around NUMBER_TOKEN u.s but its launch came at the same time that the NUMBER_TOKEN series was being discontinued in favor of the new powerbook NUMBER_TOKEN which came with a powerpc cpu already with low demand prices quickly fell to NUMBER_TOKEN or less wikipedia claims that only NUMBER_TOKEN NUMBER_TOKEN of these upgrades were sold and while it doesn't cite any sources that number doesn't seem too far off what was a bit more popular for NUMBER_TOKEN series owners were the third-party cpu upgrades that followed newer technology sold three versions of its own processor cards clocking in at NUMBER_TOKEN NUMBER_TOKEN and NUMBER_TOKEN megahertz these weren't cheap but offered a solid performance boost and were still much less expensive than buying a whole new laptop but the rarest upgrade was one appled offer itself likely as a way to clear out remaining inventory after the powerbook NUMBER_TOKEN series launched the company sold NUMBER_TOKENc models with the powerpc card already installed called the powerbook NUMBER_TOKEN with powerpc they were sold only briefly at the end of NUMBER_TOKEN. unfortunately there doesn't seem to be a way to know if this machine is one of those or if it got upgraded by its owner some other upgrades did happen though it's got a NUMBER_TOKEN megabyte ram expansion module which when coupled with the NUMBER_TOKEN megabytes on the cpu card takes the powerbook to its NUMBER_TOKEN megabyte limit the original hard drive has been swapped out too with a one gigabyte unit but this drive is special one gig scuzzy laptop drives were very rare and expensive even when new so this microtech roadrunner pulls a clever trick it's actually just a standard ide hard drive from ibm that has a bridge board attached to the bottom to convert it to scuzzy these were even more expensive than the cpu upgrades selling for nine hundred dollars for the one gigabyte version or a thousand dollars for NUMBER_TOKEN gigs a competitor named seaward technology sold its own version which by the middle of NUMBER_TOKEN became a little more affordable at six hundred dollars but if you were a power user and loved your powerbook NUMBER_TOKEN it was probably money well spent back to the repair the display's front panel slides forward and lifts off to expose the lcd itself
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