1. This forum section is a read-only archive which contains old newsgroup posts. If you wish to post a query, please do so in one of our main forum sections (here). This way you will get a faster, better response from the members on Motherboard Point.

Wrong power supply/laptop won't turn on now.

Discussion in 'Laptops' started by Alan in Boise, Jun 25, 2003.

  1. Long story short, the wrong power supply was hooked up to my wifes Compaq
    Presario 1693. 30 volts D.C. was fed to the laptop instead of 19 volts.
    Now the laptop will not turn on. The correct power supply works ok but the
    laptop won't turn on now.

    I am assuming that there may be a fuse on the board that is blown as a
    protection against this kind of abuse. I have built many a desktop computer
    but never have ventured into a laptop. I know it may not be recomneded to
    self repair but I am not willing to put a whole lot of money into this older
    unit. If it is possible to get to the fuse and replace myself, I would love
    any help I could get to tell me how. Or is there no fuse and the board is
    just fried? If it is I would rather place the $'s towards a new laptop.
    Thanks for any help that can be offered.

    Alan in Boise
    Alan in Boise, Jun 25, 2003
    1. Advertisements

  2. Alan in Boise

    Ray Jenkins Guest

    For whatever my experience is worth, I've had reasonable success working on
    laptops. Including a Presario 1240. If I were you I'd give it a shot, since
    there's nothing to lose.

    I know a guy in Long Island who supplies parts and has even done repair for
    me. If you need the name I'll try to look it up.
    Ray Jenkins, Jun 25, 2003
    1. Advertisements

  3. No fuses, sorry. What's likely happened is the DC/DC Sub-Board is
    fried. It's possible that the tip&ring was different. Tip&Ring you
    ask? Look at the barrel connector. Tip is the inside, ring is the
    silver outside. Mine is +tip, -ring. There's usually a little symbol
    on the adaptor where the voltage/amperage is show.

    - ---C*--- + would be - ring, + tip.

    + ---C*--- - would be + ring, - tip.

    Or too many amps.

    Anyway. If your laptop has a dedicated sub-board, try looking on eBay
    for one. Great place to get new or used pieces for laptops.

    If it's your mainboard, it's not going to be cheap.
    Stromm Sarnac, Jun 26, 2003
    1. Advertisements

Ask a Question

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.