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Thank you both for your replies.  After a little more investigation I can report the following: The LED blink pattern is apparently 00000111.  There is indeed a one-second delay between repeats but the fast flashes are much faster than 0.5 seconds and the space between much smaller than 0.3...

Yesterday I tried to boot a recently-acquired SE Mac and am experiencing what I believe is a hard drive issue:  Similar to the description on http://www.ccadams.org/se/boot.html, the machine has an internal HD but will not boot from it; I can boot from a floppy (OS 6.0.8) to a desktop but the HD...

I have extra Sony drives 800 and 1.4.  I have a PROM burner.  I have extra SEs that I could "convert".  But I only have one SE/30 and one SE FDHD, both working.  I purchased the SE FDHD as a "project" which supposedly had "issues" but the damned thing runs like a top, so I'll have to keep...

Thanks for your replies.  Today I located a PDF of SwimChip User's Ref, copyright 1988 from Apple.  There was enough technical detail in the document to let me understand that the IWM and SWIM (they refer to it as ISM) are both dedicated controllers, along the lines of the Zilog or NEC chips...

Is there an EPROM / EEPROM which has the same pinout and capacity as the Macintosh's masked ROMs?  I would like to copy my FDHD's ROMs and equip another SE with FDHD capability.  Aside from the MFM 1.4 drives, I believe these are the only differences between the machines.  Am I correct? -CH-

I am new to Macs so I decided to acquire a basket-case to practice with.  I disassembled the chassis to its components and began with recapping the power supply.  I came to the same problem 68krazy had with finding a replacement for the 620uF 400V cap on the inlet side of the supply:  Many were...

I read in the Larry Pina books that this fan is not only noisier but also is associated with EMI that can affect the display.  Ferrite bead clamshell recommended for leads to video. -CH-

Thanks for your reply.  I eventually attached a known-good modem and tested with that.  Although the handshake test still failed the throughput tests passed.  I understand from reading that the handshaking is hardware-based; I don't know why that would fail but the modem cable is molded-on and...

I acquired an SE about a month ago - first one I have owned - and recently posted here a question concerning printing from the SE.  (I have a StyleWriter and couldn't make it work with the SE / OS 6.0. 8-) . Since then I have been running tests on the machine and today ran Snooper 2.0, which...

I found the PowerPrint v.3.x software in the Macintosh Repository.  After downloading and un-stuffing the 4-disk-image file I read in the Readme file that V.3 is made for use with System 7 OS.  There is another version, 2.5.x, that according to the Readme functions with OS 6.0.7 and 6.0.8, which...

Thank you all for your suggestions, and especially to Gorgonops for the warning.  I understand the port is for SCSI; I have been using it with a Zip drive. I have a serial-to-parallel (Apple DIN 8 to small Centronics DSub) adapter + cord.  It is labeled "PowerPrint" and "GDT Softworks" on one...

Hello!  I am a first-time poster here with a question specific to printing from a Mac SE that is running OS 6.0.8.  (I also have other Macs: SE/30, Quadra 650, beige G3 desktop). The SE is recently-acquired and my first compact Mac, about which I know comparatively little.  I am currently...