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How do I get into bios?

Discussion in 'Electronic Repair' started by [email protected], Apr 13, 2005.

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  1. Guest

    I have a Twinhead laptop with the following markings: Slimnote 486SLC.
    The bios information that comes up on boot is as follows:

    CL-G6410VGA Bios Version 2.10C
    Copyright 1992 Cirrus Logic Inc, All Rights Reserved
    Copyright 1987-1990 Quadtel Corp, All rights reserved

    Phoenix Bios (TM) A386 Version 1.01
    Copyright (C) 1985-1991 Phoenix Technologies LTD
    All rights reserved

    Phoenix Bios for VLSI 82C310/82C312
    80486LC Bios version 1.1, 11/22/93 All rights reserved
    THAPM bios for VLSI 82C310/312 Version 1.20

    Doing a system info using "Checkit" shows that the Rom bios is Phoenix
    and the date is 4/19/90
    The processor is identified as a 80386AT machine (A20 active),
    Note: The diagnostic program I used, (Checkit) is rather old so it
    could be mistakenly identifying this machine as a 386 when it is in
    fact a 486 but that is not my concern. The machine has a VGA accessory
    jack in the back so that I'm assuming you can connnect a VGA monitor to
    it. I never tried to do this until today and found that it will not
    work. You do see some raster changes taking place on the monitor during
    bootup but you never get a display. I was thinking that perhaps I might
    have to go into bios and tell the machine that it is outputing to an
    external display rather than the LCD one? If so that calls for two
    questions. Should I be able to get a simultaneous display on the laptop
    as well as the external monitor? And then if not how do I get into
    bios? (I would like to know this anyway). I have tried Delete, Alt,
    Cont Z , C, F1 every combination that I could think of and nothing
    works. You see, I need to connect up a video projector that came in for
    repair to this laptop and need to determine that it will produce a
    normal display on a VGA monitor first. Any assistance with this problem
    will be greatly appreciated.
    Lenny Stein, Barlen Electronics
  2. To enter the CMOS, try F2. If that doesn't work, you might try holding F2 &

    Most laptops that I have seen use (FN)F5 to 3-way toggle the LCD, external,
    or both.

  3. Try holding down any key during boot. Many BIOSs will see that as a
    keyboard failure and may offer to enter setup.
  4. Tom

    Tom Guest

    As Shawn D'Alimonte so eloquently stated:
    Where's the 'any key'??? LOL

    Had to be said...might as well be me. ;-)

    "That man is richest whose pleasures are cheapest."
    -Henry Thoreau

    "The original point and click interface is a Smith and Wesson"
  5. Franc Zabkar

    Franc Zabkar Guest

    Try Ctrl-Alt-S or Ctrl-Alt-Esc

    - Franc Zabkar
  6. Lee Babcock

    Lee Babcock Guest

    Lenny...... your machine is in fact a 386. The SLC chip was made by
    Cyrix, a little thing about three quarters of an inch square and it went
    like stink (for its time). They usually had an oversize heat sink as
    they ran very hot.
    Most early Phoenix Bios were accessable ONLY with a bios change program.
    There are (read... used to be) lots of freeware stuff out there for this.
    BTW, the bios program for the 286/386 Compaq's will usually work on this.
    As for the VGA port, I think you will find it is an EGA. Same socket,
    different pinning.
    I think that TI actually made these machines for Twinhead.
    This link may help on the BIOS

    Lee in Toronto
  7. James Sweet

    James Sweet Guest

    IIRC 486 SLC uses a 386 chipset so it'll detect as a 386.

    Some of these laptops had a special driver to select the VGA output from
    within the OS, you might have to find that.
  8. James Sweet

    James Sweet Guest

    The SLC chip actually ran quite cool and didn't require a heatsink, I had
    one in my desktop machine many years ago, it was indeed as fast as the real
    486 my friend had at the time.

    The later Cyrix Pentium class chips did indeed run very hot, and were not as
    fast as claimed for most tasks either.
  9. Jamie

    Jamie Guest

    i can give you some idea's
    on the Start up try at memory scan.
    DEL Key, common to many but not to common in Phenix type bios.

  10. Lee Babcock

    Lee Babcock Guest

    The SLC's came from 16 - 40 Mhz and the higher speed ones were very hot
    indeed! They actually produced a tiny little cooling fan on a heat sink
    for them, but getting replacements for them was almost impossible
    Lee in Toronto
  11. Franc Zabkar

    Franc Zabkar Guest

    If it's 15 pin it's VGA.

    In any case the Cirrus Logic VGA BIOS identifies itself as
    "CL-G6410VGA Bios Version 2.10C".

    - Franc Zabkar
  12. Guest

    EGA did NOT have the same socket as VGA...
  13. James Sweet

    James Sweet Guest

    The confusion is probably that some early multisync VGA-capable monitors did
    have the 9 pin connector, and many early VGA boards did as well so they
    could drive a CGA or EGA monitor though I think they all had the 15 pin also
    to run a VGA.
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