System failure due to improper motherboard installation

Elite P5hx-b Pentium Motherboard technology fine, is the assembly of desktop computers and servers are more ideal for one of the motherboards. Existing a 386 microcomputer upgrade using the board color like S3 virge 30 Color card (2M FDO memory), 32M Edo Ram, Kun Teng bf 2.5G hard disk, Intel Pentium CPU, sony-7e four times times the speed of the CD-ROM drive.

Failure phenomenon: Elite P5hx-b Pentium Motherboard technology fine, is the assembly of desktop computers and servers more ideal motherboard. Existing a 386 microcomputer upgrade using the board color like S3 virge 30 Color card (2M FDO memory), 32M Edo Ram, Kun Teng bf 2.5G hard disk, Intel Pentium CPU, sony-7e four times times the speed of the CD-ROM drive. Power on the outside of the chassis to start successfully, but after loading the chassis can not start, the host speaker silent, no image, the motherboard has power display (power indicator light on).

Failure Analysis: The power on the outside of the chassis to start successfully, indicating that each connector has no problem, it is estimated that local short circuit. Because the old chassis is usually small, it is not possible to install some of the cards that are popular on the market. After careful observation of the installation, it was found that the motherboard two hot chips, and the chassis is old-fashioned, 5.25-inch drive bay low, while touching the two heat sinks, resulting in a short circuit between two transistors. The fault arises from this.

Fault handling: temporary paper gasket between the heatsink and the carrier, the power to start successfully. Use the OS/2 Warp 3.0 system disk Bootmanager for dual-boot partitions, loaded into MS-DOS 6.22 and applications, all normal. But loaded in Chinese Windows 95 o'clock display can not find the mouse, quit the restart MS-DOS 6.22, into WPS, NC 5.0 and so on all normal, replace a photoelectric mouse, the pilot mounted Windows 3.2. Or to show that the mouse is not found, restart the "inearated Peripherals" column in the BIOS and change "on Board serial Port1/port2" to: "3fb/irq4, 2f8/irq3, 3e8/irq4 (wake Up Event in Doze & Stanbdy) "All off, suspected to be energy management shut down the communication port, then set the IRQ3, IRQ4 to on, and restart after the disk is still unresolved. After careful examination, found that a piece of heat sink although pad of paper, but with a little contact with the chassis drive carrier, so simply remove the board, find a saw blade, the drive tray up saw 20mm, reinstall hard software, all normal.