[Thinkpad Tablet General] :
the that's it... i will search some stuff i had to check something i had on my mind at some point and abandoned, but it's unlikely will work, make peace with... it's bricked

no, has nothing to do with your stuff... that guy surely wants to program his bios yet why would he short serial data ouput beats me as it's irrelevant for the operation

no, you do NOT need another bios, your hardware is fine, just as it was before, the firmware in your bios is not (to compare: if the bios chip is the disk then the firmware is the software that's on it and even if your pc doesn't boot because of bad software the disk is just as good as before, it just needs another software on it to be able to boot the pc)

well, it's a long road this one, are you sure you cannot find a local phone repairing? would make your life a lot easier, i can give them the exact instructions on what to do, for them is the same as opening a phone (easier as 1380 has alot more space in it) they just need to have the programmer and the specific tools (and at a phone repairing center is impossible not to have) in the long run you will get a lot cheaper.

to sum up, what are the operations that one needs to do (i did) for the bios programming on this model:

1. dismantle in order to access the winbond spi

2. unplug the battery connector while doing the next operation in order to minimize the risk of shorts

3 inside you will have also to lift the metallic, large one where the cpu is too in order to access the bios chip

4. connect the programmer to the bios (spi) chip using a soic8 clip (at me it did not connect as the contacts are on the surface more than on the lateral of the chip, so i had to solder thin wires in order to connect)

5. replug the battery

6. do a programing or erase cycle, this will not succeed but partially as the cpu still tries to access the bios but is ok for us as we want to first put the cpu in a hang condition

7. unplug then replug the battery, now the cpu will hang and no longer try to access the bios (while executing the now corrupted bios firmware that resulted in the previous operation it will at some point hang on a invalid instruction code or on a wrong memory reference depending, but to the same outcome it will stop)

8. now we can erase then program the bios using the bios firmware (i will send the file to you)

9. unplug the connector, disconnect and reconnect the battery, start

it's not hard and in a phone repairing center takes them 10-15 minutes to do it

either way... your bios chip must be reprogrammed (a new good 'software' written on it) somehow and that's it, no known shortcuts to avoid it (even that guy you mentioned i am sure he did the useless grounding for a programming session using a dedicated programmer)

ps. i would advise against various 'expert' stuff you find on google... also you should stop messing with your tablet internals nothing good will happen, this is a situation when you must be patient as you can destroy it for good if you keep on doing experiments on the hardware

ps2. you must program your bios using a hardware programmer, there's no way around! the only question considering you say you cannot use your warranty (and i take that for granted tho if i wer you i would at least contact lenovo to explain them my situation, i mean ask them about the warranty not to tell them that i flashed the bios), resuming... the question is whether you will find a local phone repairing center (impossible to not fin one, come on... ) and i will give them what they need to do the job or if it is going to be you who will program the bios (i would advise agains but if you feel like you can is still ok)