| Connector | Function |
|---|---|
| CN1 | ATX 20-pin power connector |
| CN2 | USB ports |
| CN3 | Upper: PS/2 mouse port |
| Lower: PS/2 keyboard port | |
| CN4 | Upper: Parallel port |
| Lower: VGA port (left) | |
| COM1 port (right) | |
| CN5 | Primary IDE connector |
| CN6 | Secondary IDE connector |
| CN7 | Floppy disk drive connector |
| CN8 | Upper: Game/MIDI port |
| Lower: (L-to-R) | |
| Stereo line-out port | |
| Stereo line-in port | |
| Mono microphone-in port | |
| CN9 | ATI Multimedia Connector(AMC) |
| CN10 | Power switch connector |
| CN11 | Reset connector |
| CN12 | Modem microphone-in and speaker-out connector |
| CN14 | CD line-in connector |
| CN15 | IrDA connector |
| CN16 | Wake-on LAN connector |
| CN17 | Modem ring-in connector |
| CN18 | HDD LED connector |
| CN19 | System speaker connector |
| CN20 | Audio connector(for CS4610 adapter card) |
| CN21 | Turbo LED connector |
| CN22 | 3-Pin power connector |
| FN1 | 3-Pin fan connector |
| FN2 | 2-Pin fan connector |
| JP2401 | Thermal sensor connector |
| 1-2: SYS TMP | |
| 3-4: CPU TMP | |
| SKT1 | Celeron™ Processor Socket |
Aptiva 2153/Celeron™ System Board Jumper Settings
Jumper/Settings Function
---------------------|--------------------
SW-1 | Password
On | Bypass password
Off* | Check password
------------------------------------------
SW-2 | BIOS Logo
On * | OEM
Off | Acer
------------------------------------------
SW-3 SW-4 SW-5 SW-6 | CPU Frequency(MHz)
On ,Off, Off, On | 233=66MHz x 3.5
Off,On, On, On | 266=66MHz x 4
Off,On, Off, On | 300=66MHz x 4.5
Off,Off, On, On | 333=66MHz x 5
------------------------------------------
DIMM Configurations
A maximum of 256MB memory may be installed.
You can install 16MB, 32MB, 64MB, or 128MB PC-100 DIMM in any socket
and with any combination.
Please see the LEGAL - Trademark notice.
Feel free - send a 
for any BUG on this page found - Thank you.