Would it be okay to plug a 90W Thinkpad power brick to a X200? It originally came with a 65W adapter but it has stopped working. So I also have a 90W adapter that came with a T61 – can I use it without any problems?
Power Supply – Thinkpad Power Adapters Guide
power supplythinkpad
Related Solutions
This may be just a workaround, but the problem is specific enough, that a workaround solution is good enough:
As MrJackV suggested, I tried booting PLOP Linux and using its boot manager to boot my Windows flashdrive. It turned out that with PLOP flashdrive plugged in, and Windows 7 flashdrive, the BIOS could see both drives in the boot selection menu and allowed me to boot Windows 7 installer. Doing it again, but with Windows 7 flashdrive only, there are no flashdrives, same as before.
EDIT: In case someone encounters the following problem
This method caused unexpected problem - Windows 7 setup would not allow me to install the OS on the drive. The log files revealed, that the drive I tried to install it to wasn't the primary boot drive. Using tools provided with the setup utility, I created a primary, bootable partition on the internal drive, copied setup files and booted from it, with the internal drive being the only one plugged into the system.
The following is what seems to be the simplest solution. I have tried this myself and it seems to be working fine, but I can't myself judge whether there are any problems with it.
User Tamazerd posted this solution on the Lenovo discussion forum:
I used a small jump wire from a kit i had but anything will do. Just make sure it wont short against anything else!
I located where the middle pin of the power-plug is connected to the motherboard (blue cable) and used the jump wire to bridge it with one of the ground/negative ones (black).
This works good for me so far. The only problem i can see with this is if the computer now thinks that all adapters are 135W ones, even the 170W adapter. This is something i havent been able to check.
WARNING: Modifying electric equipment might be dangerous! Do this on your own risk and only if you know what you are doing.
Best Answer
Check the voltage rating on the power supply and on the laptop. If it is the same, and socket on the notebook matches the plug on power supply, it is okay: while it can provide more power than needed (90W in this case), it will behavior just as the 65W one when plugged in to that laptop.