Toshiba Satellite Pro 400CS and 400CDT
The Toshiba Satellite Pro 400CS and 400CDT are Pentium-based laptops that were released in June 1995. They were the first Pentium laptops in the Satellite Pro series.
If you have a Satellite Pro 405CS, it is identical to the 400CS. The only difference is that it was sold with a longer warranty and some extra included software.
Specifications
| Spec | Satellite Pro 400CS | Satellite Pro 400CDT |
|---|---|---|
| Release Date | June 1995 | |
| CPU | CPU Type: Soldered TCP Intel Pentium @75MHz | |
| Chipset | Toshiba SCPCNT-GA | |
| RAM | Type: Proprietary Standard: 16MB Maximum: 40MB | |
| Storage | 2.5" IDE Requires Adapter: No Standard: Unknown | |
| Display Options | 10.4" Passive Matrix Color @640x480 | 10.4" Active Matrix Color @640x480 |
| Graphics Chipset | Chips & Technologies 65546 VRAM: 1MB | |
| Audio | ESS AudioDrive 688 | |
| Main Battery | Lithium Ion | |
| CMOS Battery | - 3-cell Varta NiMH (CMOS Battery) - 6-cell Varta 6/V110H NiMH (Reserve Battery) | |
| Power Supply | Internal, uses standard 2-prong mains voltage plug | |
| Media Drives | Modular bay, holds CD-ROM or floppy drive | |
| PC Cards | 2x PCMCIA Slots | |
| Networking | None | |
| Other I/O | - 1x Parallel - 1x Serial - 1x VGA Out - 1x PS/2 - 1x Dock Connector - 1x External FDD Port - 1x Line Out - 1x Line In - 1x Mic In - Infrared | |
| BIOS | Toshiba | |
| Pointing Device | TrackPoint | |
Resources
 Service Manual |
|---|
Common Faults & Maintenance
CMOS/Hibernation Battery Leaks
The biggest issue facing the 400 series laptops is the two VARTA NiMH batteries it has inside, located on the left side of the laptop, under the keyboard. One is a 3-cell battery, used for CMOS backup. The second is a much larger 6-cell battery, using double-wide cells, used to keep the laptop alive in hibernation mode when swapping the main battery pack. Both of these batteries are EXTREMELY prone to leaking, and due to the fact that they're located right next to critical components, a very large number of these laptops have been permanently destroyed by these batteries. It is critical that these batteries are removed in any 400CS or 400CDT.
Brittle Plastic
Toshiba's plastic is now extremely brittle. Handle all parts of these laptops with care. Luckily, the hinge mounting design on these laptops is well designed, but I have seen a couple with cracked plastic near the hinges.
Page last updated (MM/DD/YYYY): 04/09/2025
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