The Latitude C640 is a 14-inch Pentium 4M-based business laptop that was released in July 2002. It succeeded the Pentium III-based Latitude C610, with its new features including the Pentium 4M processor, faster graphics, and DDR memory. The C640 remained on sale until sometime between August and October 2003.
The C640 was also sold with altered styling as the Inspiron 4150.
Spec | Details |
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CPU | CPU Type: Socket 478 (Northwood-M) Intel Pentium 4M "Northwood" @1.6, 1.8, or 2.0GHz |
Chipset | Intel 845MP |
RAM | DDR, 2x Slots Standard: Unknown Maximum: 2GB |
Hard Disk | 2.5" IDE Uses proprietary adapter?: Yes Standard: Unknown |
Display Options | - 14.1" TFT LCD @1024x768 - 14.1" TFT LCD @1400x1050 |
Graphics Chipset | ATI Mobility Radeon 7500 VRAM: 32MB |
Audio | Crystal 4205 |
Main Battery | Lithium Ion |
CMOS Battery | 6-cell Varta NiMH (2x3) |
Power Supply | Latitude C-Series 3-pin - Dell PA-2, PA-6, or PA-9 |
Disk Drives | Latitude C-Series Modular Bay supporting the following: - Various CD & DVD Drives - 3.5" 1.44MB Floppy Drive - ZIP Drive - 2nd HDD - 2nd Battery |
PC Cards | 2x PCMCIA/CardBus Slots |
Networking | - Modem - Ethernet - WiFi (Optional) |
Other I/O | - 1x Parallel - 1x Serial - 1x VGA Out - 1x PS/2 - 1x USB 1.x - 1x S-Video Out - 1x Dock Connector - 1x Line Out - 1x Mic In - Infrared |
BIOS | Dell BIOS (Phoenix-based) |
Pointing Device | Trackpad and TrackPoint |
Drivers |
User Manual |
Service Manual |
Schematic |
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The Varta NiMH CMOS battery in the C640 is highly prone to leaking and should be removed from every single C640 if original. The battery is under the keyboard. Unlike the C610, it isn't directly over the motherboard, but a leak will still cause corrosion around the battery connector.
The LCD lid latch mechanism on the C640 wears out easily and often stops working.
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