Electronics > Repair

What more i can do?

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asis:

--- Quote from: 222Lab_Test222 on December 02, 2024, 07:18:01 am ---1. The first is CMOS Battery, When beeping if i change this CMOS battery, it stops in some cases.

--- End quote ---

Hi,

@222Lab_Test222

Could you do it correctly when replacing the CMOS battery.
That is, - having removed the battery (with the device turned off), short-circuit its seat with anything and wait for some time (10~30 sec), so that the transistors of the complementary pair (CMOS) finally lose their conductivity.
-
You mentioned that these boards have a long service life and batteries, as a rule, have a service life of 3 - 5 years.

Everything strongly depends on the quality of the CMOS transistors in ChipSet's.
That is, they can be powered by the "Holy Spirit" - for a very long time.

Harry_22:


--- Quote from: 222Lab_Test222 on December 02, 2024, 07:18:01 am ---
--- Quote from: smaultre on December 02, 2024, 03:44:12 am ---
Or something like that. Topic starter have several boards with same issues..

--- End quote ---
Same issues board like beeping has many solutions in this board,
1. The first is CMOS Battery, When beeping if I change this CMOS battery, it stops in some cases.


--- End quote ---

This is a new case for me. If the battery is completely discharged, it leads to the machine making a continuous beep.

The machine beeps from the beginning until it is interrupted by the program (BIOS).
So if the program crashes, the sound signal will be continuous.
This means that before removing the beep, the program reads the  IС 14 (СMOS) and stops.

Ones again we found out that the program crashes at different clock steps at the beginning. It takes around 7 clock steps to stop.
We assumed that some signal on the Address or Data bus is corrupted (please see the last resume at #346).


@222Lab_Test222, how much more time do you need to get yourself together and look at the signals on the buses?  :)

smaultre:

--- Quote from: 222Lab_Test222 on December 02, 2024, 07:09:23 am ---
--- Quote from: smaultre on December 02, 2024, 03:44:12 am ---I think that's the wrong switch config or after battery replacement or draining.
Or something like that. Topic starter have several boards with same issues..

--- End quote ---

Can you clarify more on it?

--- End quote ---

Try to click all of the switches for several times ~20-40 each. The contacts may be weak and oxidized BIOS can't read/set adequate config.


AS Harry_22 says  It looks like "This means that before removing the beep, the program reads the  IС 14 (СMOS) and stops." it can stops for bad config.

Next step you need to check Data & Adress buses lines & compare with the working-one's.

222Lab_Test222:

--- Quote from: Harry_22 on December 02, 2024, 03:05:18 pm ---
@222Lab_Test222, how much more time do you need to get yourself together and look at the signals on the buses?  :)

--- End quote ---

Which address BUS you talking about, did i miss something again.
A lots of things going here and there, can you tell me again what pins of BIOS to check?

222Lab_Test222:
The address and data bus, ohh i checked last time, in 2us division,
Every minutes or every time i check i got a new different signals so i stopped going further. Looks like i forgot to mention.

I think i need to change the division, in which division shall i check?

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