Right. okay:
Number 1: If you fire a Sun up with no keyboard and mouse it'll boot, complain, then turn the monitor output off. It drops into headless mode and will only respond to a serial console and will not activate the video screen. It will STILL BOOT though. If you can hook up a console to serial port A on the back then you will be able to fully interact with the machine at a console level with (obviously) no X desktop. Be CAREFUL, it's the opposite gender (female) to PC serial ports, I had to buy some 25-pin gender changers for my Null Modem cable!
Number 2: You don't set the mode in the X config (what do you think this is, Linux?!! [
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. You shouldn't need to set it at all (see Number 3), but if you do you set it in the OpenBoot Prompt (the Sun breed of OpenFirmware), or if it will fire up into a console you can also pick a mode with 'fbconfig' on *some* machines (they both worked on my U10 IIRC). Becasue the framebuffer mode is used for ALL the graphics, console, and XWindows, it is set outside the X config.
Number 3: Suns are pretty good at picking up the default mode for LCDs off of the
EDID. My Ultra 60 picks up the EDID of my 17" LCD perfectly at 1280x1024@60Hz, and from memory my U60 used to also. This can cause amusing shenanigans if you use a KVM though, hence why you can also set it manually in the OBP.
Number 4: as for the bleeping and shutting off, maybe you should ask the seller if it bleeps and turns of the monitor or of it bleeps then shuts down completely. The former is just it having a hissy fit about not having a keyboard. The latter is the POST diagnostic failing, in a big way. Generally if the CPU module is installed correctly with the retaining bar in place it won't come loose. Bad RAM and/or main-board could cause the error, but these are easy to replace as any U5 or U10 EXCEPT the U5/270 use the same board (the u5/270 has an even-worse framebuffer).
If you get a Sun keyboard and mouse you are on a winning start. You may also want to download the latest distribution of Solaris 10. It's free (woot!).
Class dismissed! [
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