NETGEAR is aware of a growing number of phone and online scams. To learn how to stay safe click here.
Forum Discussion
Solved
R8500 bricked
Hi All. This is my first report. I purchased on purpose the above router on Ebay. I can not register it Serial 4DG65B7G019C5 it is used like mint. The reason i found it is the best range router an...
This is my final procedure after I fixed the second router r8500.
1) J4 connector pins : 1 2 3 4 pins are visable by looking the motherboard and they are located in the front view.
and j4 mark is located next to #1 pin. 1 gets green color, 2 gets white color, 3 gets green color, 4 is not connected.
2) open the bottom cover by removing the 6 tork screws.
Take the cover half way out so you can see the j4 plug and plug the serial cable.Turn on the router.
3) Start Putty let it run for a minite or so and start sending control c commands until you will see CFE.
4) on CFE type nvram erase you will see a 0 as an answer.
5) On CFE type tftpd you will get tftpd server ready ::
6) go on comand mode dos cmd>tfttp -i 192.168.1.1 put C:\r85.chk
r85.chk will be your old firmware located on the c:\ main directory
7) Now you will see a blue led on the #1 port flickering comminicating.
8) if what you did is correct then you will get from dos and putty file tranfered successful.
9) Now hold the reset button with a pin and turn the power off.
10) with the pin on reset turn power on and waight for 3 reboots let the pin go.
11) waight for 2 minutes you will see many led's comunicating and final the main led will be normal.
12) The router is now ready to be configuerd.
13) The network name and password is located on the white paper top right or at the bottom of the router.
I did 2 units the first one it took 1 week the second one it .5 hour.
Good luck.
peter11742
Hi Peter11742
I was going through this thread "R8500 bricked" earlier because i am encountering a similar situation R8000. I followed your steps but encountered some differences. I was wondering if you could lend me some advice.
Just some background, i bought a bricked router R8000 from someone who claimed it is fully working. After i realised it was bricked, i decided to get serial cable, disassembled the chassis to fix it. Please bear with me as this is the first time i am doing this to a router, i usually use routers off the shelf.
Back to the steps you have listed. using it as a checklist so you can see the steps i completed.
1) J4 connector pins : 1 2 3 4 pins are visable by looking the motherboard and they are located in the front view.
and j4 mark is located next to #1 pin. 1 gets green color, 2 gets white color, 3 gets green color, 4 is not connected. Done
2) open the bottom cover by removing the 6 tork screws.
Take the cover half way out so you can see the j4 plug and plug the serial cable.Turn on the router. Different router, i remove everything until i get the pcb board, plugged in my USB-TTL cable (similar to serial cable) Done.
3) Start Putty let it run for a minite or so and start sending control c commands until you will see CFE. If i wait for a minute to start sending control C command, I cannoit get into CFE. so i started once putty starts. I got into CFE.
4) on CFE type nvram erase you will see a 0 as an answer. Done
5) On CFE type tftpd you will get tftpd server ready ::Done
At any time now press control c untill you see CFE run nvram erase get a 0. Done
On CFE enter tftpd and waight there. Done, but see screenshot below. PuTTy just stops there, router lights also stops blinking. believe it is turned off. Is it supposed to be like this? Do i continue with the next step of going to doc cmd?
Any help will be appreciated. Thank you in advance!
Demonstrative
Hi.
You forgot to connect your PC with the dos command and the specific instructions see my procedure.
Follow my instructions and repeat the procedure it works.
Best regards.
Peter11742
After starting TFTP , I typed in cmd>tftp -i192.168.1.1. put C:\R8000-V1.0.44_1.0.96.chk firmware
I waited for the pop up you mentioned, but there was just nothing happening.
Can i check if the line i type is correct?
my R8000....chk file is placed in C:
You forgot to have a space ON -i 192.168.1.1. -i192.168.1.1. put C:\R8000-V1.0.44_1.0.96.chk firmware
Be sure that the firmware is the first version firmware from Netgear.
If you did all the procedure correctly you should observe the data led that is flsfhing with the data.
Re do the procedure and let us know.
peter11742
Hi peter11742
please see screenshot. Connect request failed.
any idea why this happens? am i misssing any steps?Hi All.
I am stuck on CFE after following all the steps in this thread, I have Putty connected, but getting the following error:
data cheksum validation failed. Any idea if possible to get CFE prompt?
The only solution that I can tell you is the following.
Take the power from all you devises off that means the router and your computer.
Now work on your router alone Make a procedure that resets the router by pressing the reset button and waiting 30 seconds.
Now you can start again with the putty and dos procedure. It should work because I had this problem and now the router works with the first firmware from NetGear. Good luck.
Peter11742
Thank you, Peter.
I have already tried that before. Reset is totally dead and not doing anything. I did power off/on, 30/30/30 reset, nothing seems to work on this router. Putty always brings same message when checking EEPROM.