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This forum is part of our mission to promote the preservation of vintage computers through education and outreach. (In real life we also run events and have a museum.) We encourage you to join us, participate, share your knowledge, and enjoy.

This forum has been around in this format for over 15 years. These rules and guidelines help us maintain a healthy and active community, and we moderate the forum to keep things on track. Please familiarize yourself with these rules and guidelines.


Rule 1: Remain civil and respectful

There are several hundred people who actively participate here. People come from all different backgrounds and will have different ways of seeing things. You will not agree with everything you read here. Back-and-forth discussions are fine but do not cross the line into rude or disrespectful behavior.

Conduct yourself as you would at any other place where people come together in person to discuss their hobby. If you wouldn't say something to somebody in person, then you probably should not be writing it here.

This should be obvious but, just in case: profanity, threats, slurs against any group (sexual, racial, gender, etc.) will not be tolerated.


Rule 2: Stay close to the original topic being discussed
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To put things in engineering terms, we value a high signal to noise ratio. Coming here should not be a waste of time.
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  • Use the Private Message system for posts that are targeted at a specific person.


Rule 4: "PM Sent!" messages (or, how to use the Private Message system)

This forum has a private message feature that we want people to use for messages that are not of general interest to other members.

In short, if you are going to reply to a thread and that reply is targeted to a specific individual and not of interest to anybody else (either now or in the future) then send a private message instead.

Here are some obvious examples of when you should not reply to a thread and use the PM system instead:
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Why do we have this policy? Sending a "PM Sent!" type message basically wastes everybody else's time by making them having to scroll past a post in a thread that looks to be updated, when the update is not meaningful. And the person you are sending the PM to will be notified by the forum software that they have a message waiting for them. Look up at the top near the right edge where it says 'Notifications' ... if you have a PM waiting, it will tell you there.

Rule 5: Copyright and other legal issues

We are here to discuss vintage computing, so discussing software, books, and other intellectual property that is on-topic is fine. We don't want people using these forums to discuss or enable copyright violations or other things that are against the law; whether you agree with the law or not is irrelevant. Do not use our resources for something that is legally or morally questionable.

Our discussions here generally fall under "fair use." Telling people how to pirate a software title is an example of something that is not allowable here.


Reporting problematic posts

If you see spam, a wildly off-topic post, or something abusive or illegal please report the thread by clicking on the "Report Post" icon. (It looks like an exclamation point in a triangle and it is available under every post.) This send a notification to all of the moderators, so somebody will see it and deal with it.

If you are unsure you may consider sending a private message to a moderator instead.


New user moderation

New users are directly moderated so that we can weed spammers out early. This means that for your first 10 posts you will have some delay before they are seen. We understand this can be disruptive to the flow of conversation and we try to keep up with our new user moderation duties to avoid undue inconvenience. Please do not make duplicate posts, extra posts to bump your post count, or ask the moderators to expedite this process; 10 moderated posts will go by quickly.

New users also have a smaller personal message inbox limit and are rate limited when sending PMs to other users.


Other suggestions
  • Use Google, books, or other definitive sources. There is a lot of information out there.
  • Don't make people guess at what you are trying to say; we are not mind readers. Be clear and concise.
  • Spelling and grammar are not rated, but they do make a post easier to read.
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Compaq Portable POST error

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  • PhilipA
    replied
    Hm. That's interesting. Mine's had a chip replaced on the board already. Might be that one gone bad again.

    I'll have to pop it open again and see which it is and compare with you.

    --Phil

    Leave a comment:


  • Chromedome45
    replied
    Well out of curiosity I pulled the LS132 chip and the LS125. Mine are socketed. Was done before I knew about the foam problems. Well anyway I got the
    301 error but had no keyboard input. So you can rule out those 2 as possible problem chips.

    Leave a comment:


  • Chromedome45
    replied
    Hmmm mine doesn't have anything! in that area. See pic.
    Attached Files

    Leave a comment:


  • PhilipA
    replied
    Originally posted by Chromedome45 View Post
    Possibly. If there is some noise on say the 5volt line then it could be making one of the support chips or even the controller act up. As I said the engineers put it there for a reason. Just a hunch.
    I agree, if it's there, it's there not to look pretty, but to actually do something.

    This is the board in question, the two leads just to the left of the orange tantalum:

    20130813_091831 by renault9gta, on Flickr

    --Phil

    Leave a comment:


  • Chromedome45
    replied
    Originally posted by k2x4b524[ View Post
    bigger question is could that single tantalum be causing his keyboard to throw a minor error but still function?
    Possibly. If there is some noise on say the 5volt line then it could be making one of the support chips or even the controller act up. As I said the engineers put it there for a reason. Just a hunch.

    Leave a comment:


  • PhilipA
    replied
    Let me pull the keyboard apart tomorrow if I have time. The computer's currently at work

    Phil

    Leave a comment:


  • k2x4b524[
    replied
    bigger question is could that single tantalum be causing his keyboard to throw a minor error but still function?

    Leave a comment:


  • Chromedome45
    replied
    Could be that snipped Capacitor may have been a Tantalum that shorted out. Tell ya what let me take a look at my keyboard and see if I can locate the Cap in question. That was in the Keyboard circuit board correct? Those caps are in there for a reason like filtering of the power supply voltages or even sometimes key debounce. And I would replace it. Give me a day or 2 to check mine out.

    Leave a comment:


  • PhilipA
    replied
    On a positive note, the new (well, ish, it's an old cordless phone battery) RTC battery I fitted yesterday took a charge, and upon retrieving the RTC from the board with SETCLOCK, it's within a few seconds of correct this morning.

    Result.

    Slowly getting there, though this thing has fought me every step of the way so far.


    --Phil

    Leave a comment:


  • PhilipA
    replied
    I don't know either. Despite the error message, the keyboard works just fine.

    I've put it down to a quirk, for now. Unfortunately the BIOS isn't particularly verbose when you send it through POST.

    Phil

    Leave a comment:


  • WMH
    replied
    Originally posted by PhilipA View Post
    Given the condition of this computer when I got it, that could well be the case.

    --Phil
    That seems like a logical reason that you're getting an error. I have no idea how you'd test for that though...

    Leave a comment:


  • PhilipA
    replied
    Given the condition of this computer when I got it, that could well be the case.

    --Phil

    Leave a comment:


  • WMH
    replied
    Originally posted by k2x4b524[ View Post
    could his keyboard controller chip be on the way out?
    Maybe...

    Leave a comment:


  • k2x4b524[
    replied
    could his keyboard controller chip be on the way out?

    Leave a comment:


  • WMH
    replied
    Hi PhilipA,

    In Compaq desktops, 301 was a generic Keyboard Failure. I'm not 100% sure, but I would assume that it's the same for the Portable.

    Originally posted by PhilipA View Post
    With the keyboard unplugged it still throws 301, yes.
    301 is probably equivalent to a modern generic Keyboard Failure (thrown when the keyboard is missing), so I'm not surprised that the Portable throws a 301 still.

    Leave a comment:

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