Hi, everyone. And welcome to the county A A plus 2 to 0 dash ones. Those are one module one
the power own self test.
I am your instructor. Bill Price
are learning objectives for this lesson. Our toe. Understand? What is the power on self test?
Understand beep codes and what codes are covered in the company of a plus
Identify text airs in the boot process.
Understand what is a postcard?
Post the power on self test What is post
when the system unit is powered on the CPO checks throughout the motherboard and verifies that the peripherals and other hardware connected to the motherboard are in good working order,
if any other hardware is not in working order was not detected on air Mrs displayed on the screen.
Now post works before the motherboards video card is activated, and it is the first thing you see. Once the video is activated,
it works before and during the boot process.
Now think about this.
If Post works before the video card is activated,
what happens when trouble is detected before the video was activated and working
Bebe codes. That's where they come in
big Cozaar patterns of beeps used by the BIOS to indicate a serious or fatal air to the end user.
A pattern of beeps, maybe a variable numbers of short beeps or a mixture of long and short beeps.
This is dependent on the motherboard is stored.
Check your mother board manufacturers manual
because our used when air occurs before the system video has been initialized.
Bebe Ko's will be generated by the system board speaker, commonly referred to as the PC speaker.
Now let's look at it
Siri's or examples of beep codes.
The long, continuous beep tone indicates a memory failure.
No beep power supply could be bad system not plugged in or the power not turned on.
Other indicators as faras if it's no beep,
if everything seems to be function correctly, there may be a problem with the beeper itself. The system would normally beep one short beep.
Another coat to be aware off is the war long two short beeps. This indicates a video card failure
in modern day motherboards.
These two the one long, two short beeps indicating the video car failure and the long, continuous beat tone indicating the memory failure
arm or of the two common ones and the only two that you'd have to worry about in the new modern motherboards.
Now what is a beat code, not a beat code.
At the end of a successful post, the system unit will produce water, too. Short beeps.
These are just inform you that all is well and everything powered up correctly.
So let's move on the post text Ares
after video. After the video has tested okay and is activated, post errors will display on the screen.
Under normal circumstances, the text era will be self explanatory.
The text airs. I bar for more useful than the beat coats because they tell you what the problem is in playing English.
Here's an example of a post text air that you may have seen before.
You could see that the text air message is reporting that a CPU fan air has occurred.
Let's talk about postcards,
our devices that's used to
monitor the post process.
So what happens when you have a device that is not functioning so much that it disrupts the post process? He caused the system to Kenny's continuously Luke.
This will most likely caused the system to appear as if it was dead,
since video has not activated and nothing has appeared on the screen.
Worse yet, there no beat Coast to tell you what is wrong. What do you do? He is a postcard, and that's where they come in handy.
So, like I said before postcards, monitor the post process and identify which hardware piece is having issues.
Postcards are simple cars that snap into expansion slots on your system.
A small to character lit admitted dialled or led roll readout on the card indicates which device in the post is currently testing.
And again check your motherboard manual for post court air definitions.
we've called a lot of topics, So let's review
post the power on cell test when the system unit is powered on the CPU checks throughout the motherboard and verifies that the peripherals and other hardware connected to them waterboard are working
Big calls are patterns of beeps used by the BIOS to indicate a serious or fatal air to the end. User
postcards are simple cars that snap into the expansion slots of your system.
A small to character lit. Admit it dialled or an L E D. Readout on the card indicates which device the post is currently testing.
Okay, Another great start. You got a good jump on the A plus exam and learning. What? The post power of self test Waas beep coz and a handy to called the postcard.
That's all of our learning for today. I will see you next lesson.