Acer Aspire easyStore H340
The Setup
Grab the ACER Support Manual
- ACER Website H340 Service manual (SG_Aspire_easyStore_H340_BOOK_20080226.pdf)
- If the file is missing: Direct Download
To start you will need video output:
- Use up the expansion slot – PCI-express
- Use the onboard connector
From ymboc @ mediasmartserver.net which includes the pin out for VGA/PS2
[ 01 03 05 07 09 11 13 15 17 19 21 23 25 ] "CN2" [ 02 04 06 08 10 12 14 16 18 20 22 24 26 ]
01 5V 0-203Ω 5V 02 5V 0-203Ω 5V 03 0 G GROUND 04 0 G GROUND 05 ~.69V PS2 MOUSE DATA 06 ~0.6V PS2 K/B DATA 07 1.4mV PS2 MOUSE CLOCK 08 1.5mV PS2 KEYBOARD CLOCK 09 5V --> VGA12 (DDC DATA) 10 0 G GROUND 11 5V --> VGA15 (DDC CLOCK) 12 1.8V 0-88Ω 1.8V 13 5V SERIAL OUT 14 0.43V --> VGA01 (RED) 15 ~.62V SERIAL IN 16 0 G --> VGA05 (GROUND) 17 0 G --> VGA06 (GROUND) 18 ~.65V --> VGA02 (GREEN) 19 16.5mV --> VGA14 (VSYNC) 20 0 G --> VGA07 (GROUND) 21 0 G --> VGA08 (GROUND) 22 ~.69V --> VGA03 (BLUE) 23 2.9V --> VGA13 (HSYNC) 24 0 G --> VGA10 (GROUND) 25 5V 0-100Ω --> VGA09 (5V) 26 5V 0-99Ω 5V
VGA Pinout from happybison.com
|
Signal |
Acer H340 |
VGA connector |
|
DDC Data |
9 |
12 |
|
DDC Clock |
11 |
15 |
|
Red |
14 |
1 |
|
Ground |
16 |
6 |
|
Ground |
17 |
5 |
|
Green |
18 |
2 |
|
Vertical Sync |
19 |
14 |
|
Ground |
20 |
7 |
|
Ground |
21 |
10 |
|
Blue |
22 |
3 |
|
Horizontal Sync |
23 |
13 |
|
Ground |
24 |
8 |
|
VGA +5V |
25 |
9 |
The parts themselves can be bought from digikey.
Taken from happybison:
- DigiKey 455-1178-ND (26-pin housing)
- DigiKey 455-1313-1-ND (Terminators)
- DigiKey H2261-ND (26-pin housing)
- DigiKey H1504-ND (Terminators)
- DB 15 Fenail VGA connector / monitor VGA cable
Cost of the parts are less than $5 and takes about 10 minutes to put together a rough working VGA connector.
Or buy a VOVtech cable.
I started to make the cable and then I knew it would also mean I would be making a few iterations / prototypes – tweaks to make it right. I wouldn’t be able to just have a video cable – why else would I have a KVM? I sent an email to Charlies and 5 days later I have a working unit.
Debug mode
| Name | Location | Settings |
| BIOS recovery jumper | JP1 | 1-2 Normal (default) 2-3 Clear CMOS |
| System type select jumper | JP2 | 1-2 Aspire system (default) 2-3 Altos system |
| Debug/user mode jumper | JP3 | Open User mode enabled (default) Closed Debug mode enabled |
JP3 needs to enabled for the bios access
- Change the boot order otherwise you’re stuck with booting from ATA1
BIOS Update
- BIOS_Acer_P03_A_A.zip
- I haven’t figure out how to load the firmware without the ACER software that searches for a WHS.
