Hi all!

While i was trying to install CSSU on my n900 i made mistake so decide to reinstall. As it was adviced i backuped previous n900 state using backupmenu. But here i failed too, while i using this software i choose 1 file for all 2 steps of backup. Botted n900. Than understand what i have done and make another backup with right condition of files.

Then tap pressing become calculating incorrectly. It working right only for ~25% (f.e. you can click on 1 direct point and scroll views when on desktop).

1. Calibrating - not helps
2. Reflashing COMBINED only - not helps
3. Reflashing Vanilla + Combined - not helps

Dunno what to do... Help please.

I discovered, that it can be sign of slow tablet work... Like when u entering general preferences (from main menu) and got to wait for 1-3 secs for starting work with it.
So while RAM* is not fully loaded, work is fine, but when u start to tap too fast this bug comes.
But anyway bug appeared after using backup menu.
Still waiting for advices.

I found that this bug happens when the phone is overloaded. This bug not appears before i used backupmenu.
Here's an explanation
Touching incorrectly recognized at an average load of the processor.
For example when you turn on the phone or when an incoming call.
It seems that the phone recognizes just two touches: one at the point (0, 0), and the second in the place where the press.
Can you give some advice? Should I go to the service center?

Check the output of "top" from the terminal to see what is happening or use Conky.

Truth be told, I had difficulties understanding your english.

I am from Ukraine. Posting here text, wich were translated in google translator.

Now i will try to explain the problem.

1. I was trying to install CSSU. But something went wrong. So i thought that i made mistake and desided to reinstall CSSU.
(UA: Я намагався інсталювати CSSU. Але щось пішло не так, я вирішив переінсталювати CSSU)

2. As it was adviced in manual, i made backup using backupmenu before i install CSSU
(UA: Як це і було написано в мануалі, я зробив резервне копіювання стану телефону ДО встановлення CSSU)

3. I turnged OFF N900. Than i trun it ON with opened keypad and select "restore"
(UA: Я вимкнув телефон. Потім ввімкнув його із відкритою клавіатурою і обрав пункт меню "RESTORE")

4. I choosed 1 same file for otp and rootsh
(UA: В діалозі із програмою я обрав для ОДИН і той самий файл як для OTP, так і для ROOTSH)

5. Than i understood that i made mistake
(UA: Потім я зрозумів що вчинив не правильно)

6. I turned OFF N900. Than i trun it ON with opened keypad and restored previous N900 state () with right condition of files
(UA: Я вимкнув телефон. Потім ввімкнув його із відкритою клавіатурою і обрав пункт меню "RESTORE" і під час діалогу із програмою обрав уже правильні файли OTP для OTP і ROOTSH для ROOTSH)

7. After than i turned phone ON and was trying to input my PIN-CODE.
(UA: Після цього я ввімкнув телефон і намагався ввести ПІН-КОД)

8. Whyle i was trying to press on some button other zone on screen was clicked -> look at the picture 1
(UA: Коли я намагався натисніти певну кнопку, то клік відбувався в іншій частині екрану - показано на картинці 1)

9. I use phone for some time and discover, that this bug comes when phone CPU is overloaded, for example
a) U tapping very fast
b) Someone calls
c) Turning ON the phone
(UA: Я використовував телефон деякий час, щоб дослідити баг, я побачив що він з'являється коли телефон навантажується:
а) Ви клікаєте дуже швидко
б) Хтось дзвонить
в) Ввімкнення телефону)

10. To describe bug -> look at the picture 2
(UA: Опис багу на картинці 2)

This video describes pretty same problem:
http://www.youtube.com/watch?v=3QpNl42RO6c
According to comments, this bug can be induced
1. By dirt on the back side of the touch screen
2. By broken digitizer
So, please tell me.
I got to go to the service center or i got to try cleaning up the screen?
If someone already cleaned up screen, please give me some links on good manuals.

In the signature you'll find all manuals.

The digitizer was broken.
I took the phone to a service center.

You got it repaired?
Lucky guy? Or best service centre with N900 parts laying around?

Yep, Kiyv Nokia care official.

Just one more question:
did they send it in? (I assume not, otherwise you would have ended with outdated E7/N8)

Or repaired it directly at local site?
If yes, it would be good address for others (even foreign?), maybe?