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Zucker2k
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Posts: 19
Registered: ‎11-23-2016
Location: GH
Views: 3,444
Message 1 of 16

Y700 Bios Recovery - Blind Flash Possible?

Bios flash gone wrong. System stuck in a loop. Any and all help appreciated. Thanks! 

Support Specialist
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Message 2 of 16

Re: Y700 Bios Recovery - Blind Flash Possible?

Hello Zucker2k

Thanks for using the Lenovo forums.

Try a factory reset with the unit.

Note: Please back up all your data as running this reset will delete any data on your machine

1. Turn the machine off and press the recovery button which is located usually next to the power button. If you have a desktop machine you will need to power the machine back on and keep tapping the F2 key.
2. Use the arrow keys and press enter on system recovery. ( Desktop users can skip this)
3. Select “restore from the initial backup” and then “Next”.
4. Click “start” and accept the warning messages.
Length of time can vary depending on the speed of the machine.

 If these steps do not work I would recommend, that you call your local Lenovo support line for a possible service. Below is the link to the phone list where you can find these numbers




Hope this helps, let us know how you get on.


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Zucker2k
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Message 3 of 16

Re: Y700 Bios Recovery - Blind Flash Possible?

Thanks for the prompt response, Krakken! Unfortunately, that procedure didn't work. I get keyboard lights and an initial fans spin and stop, followed by a reboot after about 20 seconds. And repeat. Any other options left besides a crisis recovery?

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Message 4 of 16

Re: Y700 Bios Recovery - Blind Flash Possible?

I was going to suggest that if you have a recovery media, then you do a recovery from that.

 

You may be able to request one from support services if you contact them.

Below is the link to the phone list where you can find these numbers

 

 

Hope this helps, let us know how you get on.


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Hyperfish
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Registered: ‎08-21-2016
Location: US
Views: 3,319
Message 5 of 16

Re: Y700 Bios Recovery - Blind Flash Possible?

It should be possible. Put the *.fd file in the root of an empty, FAT-formatted USB flash drive, plug it into the laptop and keep holding Win-B while you power it on until you hear a beep. For full instructions, see here: https://www.bios-mods.com/bios-recovery/insyde-bios-recovery/

 

However, the filename might have to be changed to something else, and the key combination might also be different. Lenovo should publish this information.

 

Zucker2k
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Message 6 of 16

Re: Y700 Bios Recovery - Blind Flash Possible?

Thanks for the suggestions, guys! I agree about Lenovo needing to share the InsydeH2o crisis recovery info. HP is actively helping consumers with crisis recovery with clear instructions on their website. Why isn't Lenovo doing same? This is my 6th Lenovo laptop (Thinkpad X61s, Thinkpad T410, Y410p, Y50-70, Thinkpad x250, and Y700), but if I don't get over this issue soon, I'll be going either HP or Dell henceforth.

Zucker2k
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Message 7 of 16

Re: Y700 Bios Recovery - Blind Flash Possible?

Format Pen Drive
1. Get an empty pen drive.
2. Open Command Prompt (as Administrator).
3. Type: "Diskpart" (Without the commas; this is for all commands)
4. Note the number of the USB drive by typing: "List Disk"
5. Type: "Select Disk X" (Substitute Disk X with the number of your own USB disk. Be careful)
6. Type: "Clean" (This will wipe the pen drive so make sure you don't have any information you want to keep on it).
7. Type: "Create partition primary size=128" (This will create a 128MB partition on your pen drive)
8. Type: "Format fs=fat32 label=CD_Crisis"
9. Type: "Assign"
10. Type: "Exit"
11. Close the command prompt window.

Prepare Bios File
1. Get a copy of your bios file from the Lenovo website.
2. Double-click the .exe file, and follow the prompts. it'll extract another .exe file to C:\Bios\
3. Untick the box which says to install the bios and close the app.
4. Extract the exe file in C:\Bios\ with WinRAR. Choose "Extract file here" option.
5. Rename the extracted bios file as: CD_Crisis.bin
6. Put the renamed file on your prepared pen drive.

Now, we need to prepare the system. This involves opening your system.

Prepare Laptop For Recovery
1. Disconnect AC power and main system battery.
2. Disconnect your CMOS battery
3. Press and hold power button for 20 seconds or more
4. Plug back the CMOS power connector (not the system battery)
5. Put pen drive in the USB 2.0 slot by the power socket.
6. Press and hold Fn + R keys, don't let go yet.
7. plug in the AC power (only)

The computer will power on immediately. Keep Fn + R pressed. After a few seconds, it'll shut off, then back on again. About 5 - 10 seconds after powering on the second time, it'll search for the file on the pen drive. You can tell by the light on your pen drive or by the IO activity indicator on your laptop. As soon as you see the lights flashing, let go off the Fn + R keys. The lights will continue flashing for another two or three seconds and then the system will start beeping. This will continue for about a minute.
After that, the system will shut off, and then back on again. The first post takes a while as the system is getting reconfigured for first use. Congratulations!!!

Note: The system may shut down and restart more than once when you insert the AC cord. Keep the buttons pressed until you see the pen drive lights flickering more than once.

_____________________
For other system brands, your recovery key combo could be different. You can find out what your keys are by powering off your system, holding the key-combo and powering on again. If your battery indicator lights up red, then those are your recovery keys. In case you've already bricked your system, you could ask someone online to do the test and find out. You can use this trick to find out previously undiscovered key combos. Goodluck!
Cezar5
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Registered: ‎04-21-2019
Location: US
Views: 1,548
Message 8 of 16

Re: Y700 Bios Recovery - Blind Flash Possible?

Hello. Your reply looks very helpful. However, I can not complete step 2 preparing the file. I can not run the file for it to extract the files into c:\bios as the machine I am creating a bootable drive is different(dell not lenovo). So it gives me the message that it can not run the bios update and I can not get any files out of that. So I can not go past step 2 in Prepare Bios File.

Zucker2k
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Views: 1,516
Message 9 of 16

Re: Y700 Bios Recovery - Blind Flash Possible?

Have you been able to get around the problem? Sorry, I don't come on here often.

Cezar5
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Registered: ‎04-21-2019
Location: US
Views: 1,506
Message 10 of 16

Re: Y700 Bios Recovery - Blind Flash Possible?

Hi. Really glad you looked here. I still need help. 

I had issues with black screen and had to recover multiple times to prior point and reinstal windows saving files. In the end I backed up my files from the system partition and used reset to factory conditions. I got my laptop to work stable while plugged in for a few days. It somehow did not see video card. I went on their website to update drivers and bios. Downloaded bios and run the exe file. The bios started updating but then on restart it got corrupted and my laptop got into a restart loop. 

I searched lenovo forum for solutions, but there is not much advice here. This thread is the closest to what I have and sounds identical.

 

Please let me know what information you might need. 

 

I was trying to create bootable drive. So I formatted it the way you described in your post above. I then found a CDCN53WW version of my bios .bin file in someones post on bios-mods website as I could not extract my own bin or fd files. I also found CDCN52WW version .fd file and accompanying  .exe file. I tried throwing them both on the usb file and booting computer. I would plug the usb file into the 2.0 usb port near the plug and hold fn+r and then I would stick the AC connector and the laptop start button would start to glow white. The usb would give two blinks of blue and the fans would stop. 

 

Also the bios that got corrupted was CDCN54WW version. I was updating my CDCN35WW.

 

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