一个特殊问题

[huahua_0804]

我的机器这两面天为什么老是偶尔发生不能开机的事情,连自检都没有,有时它又好好的!真是太奇怪了!
(另附:对以前回答过我的问题的人,我这里要说声"对不起"了!!因为我来这个网站才两次,所以不知怎么给你加分,所以迟迟还没给你们结账!实在对不起!!这一点也请朋友们能告诉我,如何给别人结账!!谢谢!!)

[初学者]

检查一下电源和主板。

[setcdq9801的专栏]

呵呵，你点一下管理就可以给分了！
为什么说它没有自检？
是没有滴的一声吗？？
好像是pc喇叭坏了或是pc喇叭线掉了

[yhr3711]

可能太热了，或者你的coms设置有问题

[sibide]

交换机的解密方式和路由器不一样，应该先关机，按住mode键不动，启动机子，
进入bootrom模式，然后：
Attach a terminal or PC with terminal emulation (for example, Hyper Terminal) to the console port of the switch. Use the following terminal settings:

9600 baud rate
No parity
8 data bits
1 stop bit
No flow control


Unplug the power cable.

Hold down the mode button located on the left side of the front panel, while reconnecting the power cord to the switch. You can release the mode button a second or two after the LED above port 1x is no longer illuminated.

The following instructions appear:

The system has been interrupted prior to initializing the flash file system.
The following commands will initialize the flash file system, and finish loading
the operating system software:

flash_init
load_helper
boot

Type flash_init.

Type load_helper.

Type dir flash:.
!--- Make sure to type a colon ":" after the dir flash
The switch file system is displayed:

Directory of flash:
2 -rwx 843947 Mar 01 1993 00:02:18 C2900XL-h-mz-112.8-SA
4 drwx 3776 Mar 01 1993 01:23:24 html
66 -rwx 130 Jan 01 1970 00:01:19 env_vars
68 -rwx 1296 Mar 01 1993 06:55:51 config.text
1728000 bytes total (456704 bytes free)

Type rename flash:config.text flash:config.old to rename the configuration file.
This file contains the password definition.

Type boot to boot the system.

Enter N at the prompt to start the Setup program, Continue with the configuration dialog? [yes/no] : N

At the switch prompt type en to turn on enable mode.

Type rename flash:config.old flash:config.text to rename the configuration file with its original name.

Copy the configuration file into memory:
Switch# copy flash:config.text system:running-config
Source filename [config.text]? (press Return)
Destination filename [running-config]? (press Return)

The configuration file is now reloaded.

Change the password:
switch#configure terminal
switch(config)#no enable secret
!-- This step is necessary if the switch had an enable secret password
switch(config)#enable password Cisco
switch#(config)#^Z
!--Control/Z

Write the running configuration to the configuration file:

switch#write memory

就好啦！！而原来的配置除密码外都不变！！！

[sibide]

回错地方啦！！！不好意思！！

[lijiuhua0721]

可能是内存和显卡的问题，也有可能是散热不好，怎么加分的问题蓝鸽兄已经说了

[systemroot1]

以前有这种问题吗？如果没有，看看是不是接触的问题，可以用换件法试试看

[huahua_0804]

谢谢大家，我已经找到原因了，是接触不良造成的！CPU的转接卡有松动！谢谢！