Solved

Parallel Ports: PC doesn't start with scanner or drive plugged in.

Posted on 1998-10-17
3
324 Views
Last Modified: 2010-04-26
I've got a clone PC, Win95b, LPT1 is an add-on parallel card and LPT2 is the one on the motherboard: it was a right royal pain getting the IRQs right for these, so I hope I won't have to fiddle with them.
I've got a Syquest Sparq drive (LPT1), HP5100 scanner and HP LaserJet 6L (daisychained on LPT2).  They all work together pretty well, but: the computer will not power on if the scanner or the Sparq drive are plugged in.  I need to unplug them, start the PC, then plug them in as it boots.
I suspect it's a power supply issue: any hints?
0
Comment
Question by:mjoyce
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
3 Comments
 

Expert Comment

by:irelandone
ID: 1127026
Hi myoyce , I think you have hit it on the head. I have had the same problem using the hp6l.  It seems to be somthing with the smart turnon used by the HP it does however relate back to your power supply and the load place on it when you first turn it on having the scanner and printer plugged in.  As you stated everything works fine as long as you power on first.  I found the simpliest and cheapest option was to simply replace the power supply this was done after changing everything else in the system to try and isolate the problem including the motherboard.  Changed over power supply and no more problems.
I know this doesn't really give you the reason but hopefully you won't waste as much time as I did trying to find the fault.

Regards

Tom
0
 
LVL 7

Accepted Solution

by:
MATTCEI earned 100 total points
ID: 1127027
This can be caused by a power supply OR parallel port design defect.In the case of the latter,a 'ground loop' exists with the device(s) plugged into the port.Try to narrow it down to one device,then move it to the other port.If it turns out to be ANYTHING plugged into one port,then it is a port problem - replace it with another brand.If it's the onboard port,disable it and add another plug-in port.

Alternatively,some cheaper solutions:

If you have an AT power supply,the simple solution is to use an outlet strip to power on everything at once.

If it's an ATX supply with 'soft' power on/off (most Pentium II systems use this),plug all devices EXCEPT the system into it,turn it on AFTER the system is powered on.
0
 

Author Comment

by:mjoyce
ID: 1127028
I haven't had time to chase this up, but this seems to explain it: I do get other errors if the PC shuts down without warning, so I think that irelandone's solution of replacing the power supply will be the simplest option.
0

Featured Post

Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
assignment of laptops - risks 6 100
RAM DIMMS - real world different?? 3 82
Products to polish away touchscreen & laptop screens scratches 6 74
Pickup Truck Bed 11 65
Every server (virtual or physical) needs a console: and the console can be provided through hardware directly connected, software for remote connections, local connections, through a KVM, etc. This document explains the different types of consol…
Arrow Electronics was searching for a KVM  (Keyboard/Video/Mouse) switch that could display on one single monitor the current status of all units being tested on the rack.
This video shows how to use Hyena, from SystemTools Software, to update 100 user accounts from an external text file. View in 1080p for best video quality.

738 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question