Cisco 804 ISDN router hangs booting into TinyROM

Within the first 60 seconds of boot, enter the break sequence. Similar to what you see in the password recovery proceedure here:

Once in Rommon do a dir flash: and post the output here.

If your 803's serial number is in this range:

For Cisco 801 - 805 JAC443XXXX - JAC0505XXXX

Then you have a known bug which has a workaround and can be cured with an IOS update.

If you have a Cisco login then this is the link you need:

If not, then here is the text from the article

Products Affected a.. Cisco 801 b.. Cisco 802 c.. Cisco 803 d.. Cisco 804 e.. Cisco 805 f.. Cisco 811 g.. Cisco 813

Problem Description Cisco 801-805 and Cisco 811 and 813 boots into TinyROM upon power up or after saving any configuration from the console port utilizing Cisco IOS Software ® release 12.1(3) and later. The affected units serial numbers are listed below:

For Cisco 811 and 813 JAB0447XXXX - JAB0511XXXX

For Cisco 801 - 805 JAC443XXXX - JAC0505XXXX

In the examples above, the X represents any character.

Background A manufacturing test script set all the affected unit's configuration registers to 0X0 (instead of the correct default 0X2102) and a new "feature" or bug fix implemented in Cisco IOS Software release 12.1(3) first checks the config-register for a value of 0x0 and if there is no boot-list. If both are true then TinyROM changes the "boot action" to "none", and therefore does not boot Cisco IOS Software, leaving the console at the TinyROM prompt. Problem Symptoms Cisco 801-805 and Cisco 811 and 813 that fall in the above serial number range boot to either TinyROM upon power up or boot to TinyROM after upgrading to Cisco IOS Software release 12.1(3) and later and saving the configuration via the console port. Workaround/Solution For a unit that falls between the above serial number range and has been shipped with an Cisco IOS Software release 12.1(3) or later the problem can be resolved by entering the following TinyROM commands:

1.. At power on, the router will boot into TinyROM. 2.. From TinyROM prompt enter: set boot-action=flash set ios-conf=0x2102 save 3.. Re-boot and it will come up in IOS. For a router that falls between the above serial number range and has been shipped with an Cisco IOS Software release 12.1(2) or earlier and will be attempting to upgrade to Cisco IOS Software release 12.1(3) or later please issue the following IOS commands: 1.. At power up, the router will boot into IOS. 2.. From IOS prompt issue the commands below: ena config t conf 0x2102 exit write 3.. Re-boot is optional.

I found this information on the Cisco website and tried it, but there is no response at all from the router.

A> Within the first 60 seconds of boot, enter the break sequence. A> Similar A> to what you see in the password recovery proceedure here:

A>

A> Once in Rommon do a dir flash: and post the output here.

Serial number begins with JAB030...

MK> If your 803's serial number is in this range:

MK> For Cisco 801 - 805 MK> JAC443XXXX - JAC0505XXXX

MK> Then you have a known bug which has a workaround and can be cured MK> with an MK> IOS update.

MK> If you have a Cisco login then this is the link you need:

MK>

products_field_notice09186a00800940ec.shtml

MK> If not, then here is the text from the article

MK> Products Affected MK> a.. Cisco 801 MK> b.. Cisco 802 MK> c.. Cisco 803 MK> d.. Cisco 804 MK> e.. Cisco 805 MK> f.. Cisco 811 MK> g.. Cisco 813

MK> Problem Description MK> Cisco 801-805 and Cisco 811 and 813 boots into TinyROM upon power MK> up or MK> after saving any configuration from the console port utilizing Cisco MK> IOS MK> Software ® release 12.1(3) and later. The affected units serial MK> numbers are MK> listed below:

MK> For Cisco 811 and 813 MK> JAB0447XXXX - JAB0511XXXX

MK> For Cisco 801 - 805 MK> JAC443XXXX - JAC0505XXXX

MK> In the examples above, the X represents any character.

MK> Background MK> A manufacturing test script set all the affected unit's MK> configuration MK> registers to 0X0 (instead of the correct default 0X2102) and a new MK> "feature" MK> or bug fix implemented in Cisco IOS Software release 12.1(3) first MK> checks MK> the config-register for a value of 0x0 and if there is no boot-list. MK> If both MK> are true then TinyROM changes the "boot action" to "none", and MK> therefore MK> does not boot Cisco IOS Software, leaving the console at the TinyROM MK> prompt. MK> Problem Symptoms MK> Cisco 801-805 and Cisco 811 and 813 that fall in the above serial MK> number MK> range boot to either TinyROM upon power up or boot to TinyROM after MK> upgrading to Cisco IOS Software release 12.1(3) and later and saving MK> the MK> configuration via the console port. MK> Workaround/Solution MK> For a unit that falls between the above serial number range and MK> has been MK> shipped with an Cisco IOS Software release 12.1(3) or later the MK> problem can MK> be resolved by entering the following TinyROM commands:

MK> 1.. At power on, the router will boot into TinyROM.

MK> 2.. From TinyROM prompt enter: MK> set boot-action=flash MK> set ios-conf=0x2102 MK> save

MK> 3.. Re-boot and it will come up in IOS. MK> For a router that falls between the above serial number range and MK> has been MK> shipped with an Cisco IOS Software release 12.1(2) or earlier and MK> will be MK> attempting to upgrade to Cisco IOS Software release 12.1(3) or later MK> please MK> issue the following IOS commands:

MK> 1.. At power up, the router will boot into IOS. MK> 2.. From IOS prompt issue the commands below: MK> ena MK> config t MK> conf 0x2102 MK> exit MK> write MK> 3.. Re-boot is optional.

Tim schrieb:

After the word POST the installed DRAM and FLASH should appear. If the POST (=Power On Self Test) does not complete your hardware has a serious problem.

Before dumping the router you can try to remove the DRAM SIMM and the Flash. If the router boots into the TinyROM, you can try to replace DRAM and Flash. Else it is probably dead. I recently got a C836 replaced, it was eleven month old and still under warranty with the same symptom.

Have you verified the console cable? It is not a null-modem neither a straight-through cable.