1

00:00:02,833 --> 00:00:04,433

Let's clean this mainboard first

2

00:00:04,933 --> 00:00:07,100

Then it's ready to solder the CPU on it

3

00:00:58,400 --> 00:01:01,466

There is still some residual tin on the solder pads

4

00:01:01,966 --> 00:01:03,766

Let's flatten it with a solder wick

5

00:02:28,333 --> 00:02:30,933

Check the corners and edges for glue residue

6

00:02:37,533 --> 00:02:42,600

Then check if there are any empty pads that fall on the pads when the tin is flatttened

7

00:02:44,166 --> 00:02:45,833

Deal with it if there is any.

8

00:02:49,000 --> 00:02:50,733

This place has been cleaned up.

9

00:02:52,733 --> 00:02:56,666

Ok, then we can apply some soldering oil and install the CPU.

10

00:02:57,000 --> 00:03:00,233

Also, let's pay attention to the pit in the middle of the crystal,

11

00:03:00,666 --> 00:03:03,600

if the glue is thick, we should also scrape it

12

00:03:06,866 --> 00:03:09,400

There's no residue on these 2 places

13

00:03:09,933 --> 00:03:12,133

There is a little bit here and here

14

00:03:13,166 --> 00:03:15,333

But they are not higher, it's ok