WRT54G2 v1 broken web-interface

Sorry my bad English.
my problem:
in router broken web interface (some elements hide / or not present) : see puctures
in pic2 you can see - upgrade button hide.. i cant upgrade or rewrite firmware.
i try:
try rewrite firmware from web-interface
try reset firmware by press reset button on backside..
try change browsers (safari opera firefox ie)
try disable (css/scripts/views) in browsers
try change conection port on router and on pc
try change station pc notebook - another notebook
try connect from other OS (ubuntu xp win7 vista)
...no result
what can i do to restore original firmware??
Solved!
Go to Solution.

solution found:
switch off power from router
then press reset button and return power
press reset button while router boot.. then open browser
router must be in managment mode.
then wrote dd-wrt VxWorksKiller-G2V1-new.bin (original firmware not work i try! ..but maybe you more happy)
after that reboot router (reconnect power wire)
and wrote main dd-wrt.v24_micro_generic.bin firmware by tftp
cd /d <firmware_folder>
tftp.exe -i 192.168.1.1 PUT dd-wrt.v24_micro_generic.bin
after that reboot router 2 times - (reconnect power wire)
and do 1 hard reset (30-30-30 method)
it help me.
dd-wrt site

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Screenshot of Broken Interface

What was the procedure you followed to upgrade/re-flash the firmware through TFTP?
As TFTP firmware upgrade was failed follow the below mentioned steps.
Double click the TFTP.exe file and click run.
For Server- Enter the IP Address of the router that you assigned. By default, the router is 192.168.1.1...
For Password- Enter the password you assigned the router. By default, the router’s password is “admin”.
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Click Upgrade button to start upgrading. A progress bar should show up to show the progress.
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Firmware Datecode: 20121205
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As far as I understand there is an error in MTU Path Discovery.
tcpdump logs are attached.
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$ tcpdump -n -r printer-1.pcap
reading from file printer-1.pcap, link-type EN10MB (Ethernet)
17:20:29.337867 IP 192.168.4.135.54147 > 192.168.160.200.80: Flags [S], seq 2356029847, win 8192, options [mss 1460,nop,nop,sackOK], length 0
17:20:29.338026 IP 192.168.160.200.80 > 192.168.4.135.54147: Flags [S.], seq 614551948, ack 2356029848, win 8760, options [mss 1460,nop,nop,sackOK], length 0
17:20:29.344909 IP 192.168.4.135.54147 > 192.168.160.200.80: Flags [.], ack 1, win 64240, length 0
17:20:29.348488 IP 192.168.4.135.54147 > 192.168.160.200.80: Flags [P.], seq 1:304, ack 1, win 64240, length 303
17:20:29.348564 IP 192.168.160.200.80 > 192.168.4.135.54147: Flags [.], ack 304, win 8457, length 0
17:20:29.378872 IP 192.168.160.200.80 > 192.168.4.135.54147: Flags [P.], seq 1:513, ack 304, win 8457, length 512
17:20:29.379063 IP 192.168.160.200.80 > 192.168.4.135.54147: Flags [.], seq 513:1973, ack 304, win 8457, length 1460
17:20:29.379100 IP 192.168.160.254 > 192.168.160.200: ICMP 192.168.4.135 unreachable - need to frag (mtu 1280), length 48
17:20:29.379103 IP 192.168.160.200.80 > 192.168.4.135.54147: Flags [.], seq 1973:3433, ack 304, win 8457, length 1460
17:20:29.379135 IP 192.168.160.254 > 192.168.160.200: ICMP 192.168.4.135 unreachable - need to frag (mtu 1280), length 48
17:20:29.379251 IP 192.168.160.200.80 > 192.168.4.135.54147: Flags [.], seq 1:1461, ack 304, win 8457, length 1460
17:20:29.379272 IP 192.168.160.254 > 192.168.160.200: ICMP 192.168.4.135 unreachable - need to frag (mtu 1280), length 48
17:20:29.379274 IP 192.168.160.200.80 > 192.168.4.135.54147: Flags [.], seq 1461:2921, ack 304, win 8457, length 1460
17:20:29.379304 IP 192.168.160.254 > 192.168.160.200: ICMP 192.168.4.135 unreachable - need to frag (mtu 1280), length 48
17:20:29.379306 IP 192.168.160.200.80 > 192.168.4.135.54147: Flags [.], seq 2921:4381, ack 304, win 8457, length 1460
17:20:29.379335 IP 192.168.160.254 > 192.168.160.200: ICMP 192.168.4.135 unreachable - need to frag (mtu 1280), length 48
17:20:29.379338 IP 192.168.160.200.80 > 192.168.4.135.54147: Flags [.], seq 1:1461, ack 304, win 8457, length 1460
This is more detailed view on some packets.
$ tcpdump -nv -r printer-1.pcap
17:20:29.379063 IP (tos 0x0, ttl 64, id 1, offset 0, flags [DF], proto TCP (6), length 1500)
192.168.160.200.80 > 192.168.4.135.54147: Flags [.], cksum 0x7233 (correct), seq 513:1973, ack 304, win 8457, length 1460
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IP (tos 0x0, ttl 64, id 1, offset 0, flags [DF], proto TCP (6), length 1500)
192.168.160.200.80 > 192.168.4.135.54147: Flags [.], seq 513:1973, ack 304, win 8457, length 1460
17:20:29.379103 IP (tos 0x0, ttl 64, id 1, offset 0, flags [DF], proto TCP (6), length 1500)
192.168.160.200.80 > 192.168.4.135.54147: Flags [.], cksum 0x5edf (correct), seq 1973:3433, ack 304, win 8457, length 1460
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192.168.160.254 > 192.168.160.200: ICMP 192.168.4.135 unreachable - need to frag (mtu 1280), length 48
IP (tos 0x0, ttl 64, id 1, offset 0, flags [DF], proto TCP (6), length 1500)
192.168.160.200.80 > 192.168.4.135.54147: Flags [.], seq 1973:3433, ack 304, win 8457, length 1460
17:20:29.379251 IP (tos 0x0, ttl 64, id 1, offset 0, flags [DF], proto TCP (6), length 1500)
192.168.160.200.80 > 192.168.4.135.54147: Flags [.], cksum 0x0c1c (correct), seq 1:1461, ack 304, win 8457,
P.S. This thread has been moved from LaserJets to Multifunction and All-in-One - HP Forums Moderator

John Getzke wrote:
Its hard to understand what you are trying to do or ask here. We have some offices connected via IPSEC tunnels. IPSEC interface's MTU is 1280 bytes (not 1500 bytes as Ethernet). All other devices successfully work over this VPN link. HP m2727 works. HP m425dn does not work. As a network administrator I've traced source of problem on all possible points and found that HP m425dn has a bug in the "Path MTU Path discovery" routine. The logs I attached shows that any packet of the TCP stream that the printer (160.200) sends to host (4.135) has "Don't fragment" flag set. According to IP standard the router HAVE TO discard the packet with DF flag set and size bigger then MTU since it can not pass a packet further without fragmentation - IPSEC MTU is 1280 bytes only while HP sends 1500 bytes. The router informs the printer about this problem with ICMP message Type: 3 (Destination unreachable) with Code: 4 (Fragmentation needed) suggesting MTU of next hop: 1280. The router does not communicate with the printer itself, it just informs the printer about network problem. According to IP standard the printer HAVE TO resend this data with the size of packet decreased according to suggested size. This is expected behavior of the Path MTU discovery routine. But the printer sends the packet again with the same size and DF flag set. The router again discards the packet and informs printer... This cycle repeats again and again until connection is closed due to timeout. Therefore "Path MTU discovery" routine is broken at this device. It would not be a serious problem, but the printer resends packets at rate over 28000 pps (about 40 MBytes per seconds) and its CPU is so heavily loaded that it even does not respond to touches on its touchscreen. So an innocent attempt to print document on terminal server located at another office leads to inaccessibility of the printer.
The network dump can be downloaded in PCAP format from here.

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