20 Most Recent Chaintech 9VJL3 P4(478)/VIA Motherboard Questions & Answers


Do not have the Front Panel header pinout.

Do have;

Take an LED (Light), with two wires, and check the pins with it.
There is a Top row of pins, and a Bottom row.

Touch the first two pins in the Top row, left side. Does it light up?
No? Go to the next two pins. No? Go to the next two pins.

Keep going until the Power Supply comes on. (It is a BRIEF touch. The Power On switch is a Momentary Contact Switch )
Now you have the Power On switch pins.

LED light blinks? You have the Harddrive activity LED. (Light)
LED light stays on? You have the Power On LED. (Light)
Computer restarts? The Restart switch pins.

Short something out? NOPE. You can't hurt a thing using this method.

4 of those pins are for an internal speaker. (To hear BIOS Beep Codes with)

That's 12 of those 18 pins. (Probably less. It is two rows of 9 pins, that are stated for the Front Panel header)
4 of those pins probably won't be used.
You won't be using IR. (Infra Remote) (Only uses 2 pins, though)

Most of the time with an 18-pin Front Panel header;

Top Row:
Starting at Left side, going towards Right;
Pins 2, 4, 6, 8, 10, 12, 14, 16, and 18.
May be a pin missing in this row, or two.

Borrom row:
Starting at Left side, going towards Right;
Pins 1, 3, 5, 7, 9, 11, 13, 15, 17, and 19.
Same thing here. May be 1 or 2 pins missing.

Pins 2 and 4 are usually for the Power On LED. (Light Emitting Diode)
Pins 6 and 8 - Power On switch.
Pins 10, 12, 14, and 16 may be for the Internal speaker.
Pins 18, and 20 are usually not used.

Pin 1 and 3 for the HarDDrive activity LED.
Pins 5 and 7 for the Reset switch.

Pin 9 is usually reserved for the factory, and is a 5 Volt test point.
Pins 11, 13, 15, 17 for speaker; or not used. Same with pin 19.

(So speaker pins may be top row, or bottom row. Dunno )

Another thing. This motherboard is old enough to be using a 3 wire LED, or dual color; for the Power On LED.
LED usually had the colors Green and Yellow.
Yellow for 'Normal' mode, Green for 'Turbo' mode.

(Which is a bunch of [email protected]
Green LED, or Turbo Mode; was actually NORMAL.
Normal mode was the computer operating BELOW the Normal mode)

So pins 2, 4, and 6, may be for a 3 wire Power On LED.

Regards,
joecoolvette

Chaintech 9VJL3... | Answered on Dec 22, 2012


http://www.opendrivers.com/company/230/chaintech-free-driver-download.html

Chaintech 9VJL3... | Answered on Jul 26, 2010


Hi Conn. Here's a google cached copy, html transcript of the PDF manual. It's the best i could find, but everything is there ! http://72.14.205.104/search?q=cache:aQ9IMgJNRiUJ:seeda.ct.rmutk.ac.th/DocArc/www_content/FOLDER_3ec1af47cbc2b4.33036941/files/9VJL3.pdf+9VJL3.pdf&hl=fr&ct=clnk&cd=1&gl=ca Hope that helps ! cheebster.

Chaintech 9VJL3... | Answered on Jun 04, 2009


Have you tryed on the chaintech site ?
http://www.chaintech.co/

Chaintech... | Answered on Mar 06, 2015


could be lot of reason why it won't boot. could be bad memory, bad power supply, or even the cpu, or just moterboard itself.

Chaintech... | Answered on Nov 29, 2014


http://www.easyhelpguide.com/easyusermanual.asp?mnf=Chaintech&mdl=7NJS%20ZENITH&usrReg=0&loginprmt=1

Chaintech... | Answered on Nov 29, 2014


http://www.orgsoftcom.org/file7njs-motherboard.htm

Chaintech... | Answered on May 26, 2014


go to chaintech web site then to support then download drive from them

Chaintech... | Answered on Mar 24, 2014


if you mean a a770m-a?

Chaintech... | Answered on Dec 07, 2013

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