Solved

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

Posted on 1998-10-17
3
320 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
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

Give your grad a cloud of their own!

With up to 8TB of storage, give your favorite graduate their own personal cloud to centralize all their photos, videos and music in one safe place. They can save, sync and share all their stuff, and automatic photo backup helps free up space on their smartphone and tablet.

Question has a verified solution.

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

In this article you will get to know about pros and cons of storage drives HDD, SSD and SSHD.
What do we know about Legacy Video Conferencing? - Full IT support needed! - Complicated systems at outrageous prices! - Intense training required! Highfive believes we need to embrace a new alternative.
This is a video that shows how the OnPage alerts system integrates into ConnectWise, how a trigger is set, how a page is sent via the trigger, and how the SENT, DELIVERED, READ & REPLIED receipts get entered into the internal tab of the ConnectWise …
Need to grow your business through quality cloud solutions? With everything required to build a cloud platform and solution, you may feel like the distance between you and the cloud is quite long. Help is here. Spend some time learning about the Con…

930 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

Need Help in Real-Time?

Connect with top rated Experts

18 Experts available now in Live!

Get 1:1 Help Now