Date: Mon, 14 Mar 2005 09:28:31 +1100 From: Raymond <[EMAIL PROTECTED]> Subject: Re: [LIB] System troubleshooting - Was: Is it okay to reload
At 01:02 PM 13/03/2005 -0800, you wrote:
Date: Sun, 13 Mar 2005 13:00:56 -0800 (PST) From: Matt Hanson <[EMAIL PROTECTED]> Subject: Re: [LIB] System troubleshooting - Was: Is it okay to reload
Hey Raymond,
--- Raymond <[EMAIL PROTECTED]> wrote:
> Now I doubt you'd have the suitable dongle but that's OK ... as I recall, > that dongle didn't do anything else to signal the motherboard (you need > to hold down space to tell the motherboard you have the dongle connected
> so it wouldn't make sense if it did). If that's the case, simply measure > the voltages between ground and pins 2 through 9 and read it off that > way (it's slow but it should work).
Hmmm... sounds good. But do you think the system will output those voltages without having pressed the space bar with the dongle attached to signal the mother board to start the dongle test?
No, that's the point ... you hold down spacebar to tell the system to output the diagnostic codes (presumably so normally, if you boot with a printer attached, the printer doesn't go crazy). You don't have the dongle attached now but hold the spacebar down anyway and hopefully the system board will behave as if the dongle was attached.
Do you know which pin to measure the voltage of pins 2 - 9 against Raymond? 2 - 9 are labeled +PD0 - +PD9 whatever that stands for... I assume something like positive dongle pin 0 - 9, or something like that. In the manual, the pins on the other side of the connecter 1, + 10 - 17 are labeled:
1 -STROBE 10 -ACK (my sentiments exactly ;-P) 11 +BUSY 12 +PE 13 +SELECT 14 -AUTOFD 15 -ERROR 16 -PINIT 17 -SLIN
Yup, standard parallel port. Those pin assignments are standard across all PC printer ports. Pins 2-9 are parallel data (hence PD), 1 is strobe (tells the printer the computer is sending data), the other pins are various other signals between the computer and the printer and the + and - signs indicate if the signal is active high or active low. Simply measure pins 2-9 against ground (pins 18-25 or even just any bare metal on the outside of the case, such as the printer port shell).
> Having said that, I assume you've also checked the blink codes on the > power light (if any)?
Nothing binks at all Raymond. The system powers up, and with battery and AC adapter connected, the 1st, 3rd and 4th LED from the left light. The only thing that causes a difference in what the LEDs do is putting my little 750MB HDD in and starting the system up. Doing that, the HDD LED 2nd from the left comes on momentarily, and then turns off. Xin suggested holding the reset button in after powering up to see if it affected anything. But that does nothing with the 2.5GB & 40GB HDD, and only causes the HDD LED to come on and then immediately go off with the 750 HDD installed.
Ouch! ... well let us know how the parallel port status test goes!
Cheers!
- Raymond
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