Want to win a PS4? Go Premium and enter to win our High-Tech Treats giveaway. Enter to Win

x
?
Solved

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

Posted on 1998-10-17
3
Medium Priority
?
329 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 200 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

Free Tool: Subnet Calculator

The subnet calculator helps you design networks by taking an IP address and network mask and returning information such as network, broadcast address, and host range.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

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

In the modern office, employees tend to move around the workplace a lot more freely. Conferences, collaborative groups, flexible seating and working from home require a new level of mobility. Technology has not only changed the behavior and the expe…
On Beyond Tools A conversation I recently had with the DevOps manager of a major online retailer really made me think about DevOps monitoring tools (https://www.onpage.com/devops-incident-management-tool/). The manager and I discussed how sever…
Is your data getting by on basic protection measures? In today’s climate of debilitating malware and ransomware—like WannaCry—that may not be enough. You need to establish more than basics, like a recovery plan that protects both data and endpoints.…
Despite its rising prevalence in the business world, "the cloud" is still misunderstood. Some companies still believe common misconceptions about lack of security in cloud solutions and many misuses of cloud storage options still occur every day. …

610 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