Member Avatar for pbridgman

Hi everyone

on my moby and on loads of others there is a little mini 4 gang switch thingy, normally blue, with no 1 low, 2 high, 3 high and 4 low. I have puzzled over this for a long time and my puzzler can do no more puzzling.
can someone tell me what they are for?:!: :surprised i just cant figure it out?

what happens if you change them???


thanks

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Dani AI

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Following ’s question and ’s pointer, here is practical, non‑repetitive guidance for identifying and changing those little 4‑position configuration switches safely.

First, identify what each switch does before touching anything. Look for a silkscreen label near the block (SW1, SW2, etc.), then check the motherboard manual or the exact board/model number printed on the PCB. If no manual is available, search the board model online or photograph the area and compare with other examples. The Wikipedia article on DIP switch gives a quick overview of how these tiny toggles behave as simple on/off bits.

Safe procedure and quick troubleshooting:

  • Power down, unplug, and ground yourself. Photograph or write down the current positions so you can restore them.
  • Change one switch at a time, then boot and observe POST/beep codes or BIOS messages.
  • If the system won’t POST after a change, revert immediately to the recorded settings. If it still won’t POST, clear CMOS using the board’s clear‑jumper procedure or remove the coin cell briefly (manual will show details).
  • Use a small flat tool or a proper DIP tool; never flip switches while the board has mains power connected.

A few practical notes: manufacturers vary — ON/OFF semantics can be opposite between boards, and some switches are read only at power‑on while others require a reset. On many modern systems these hardware switches have been replaced by BIOS/UEFI settings, so encountering them usually means the board is older. If uncertain, leave the switches alone; the safest path is to consult the manual or a service note for that specific motherboard.

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Member Avatar for richh0323

They are DIP switches and are used to set up the motherboard, and vary from mannufacture to manufacture

Member Avatar for pbridgman

They are DIP switches and are used to set up the motherboard, and vary from mannufacture to manufacture

what do you mean, "set up the motherboard"???

Member Avatar for richh0323

They may be used for setting different ram speed, different processors, some are used for enableing/disableing onboard sound or vidieo cards

Member Avatar for pbridgman

They may be used for setting different ram speed, different processors, some are used for enableing/disableing onboard sound or vidieo cards

Ok. Thanks

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