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Dr. Einstein

Registered
Joined
Oct 31, 2022
Messages
17
Brand: xiaomi
Model: redmi 8
Issue: No signal sim1 & sim2

Action Taken:
Step 1: Kailangan muna daanin sa setting or factory reset or format dahil un ang basic. In my case, hindi na kasi my history na before from previous tech. At meron siyang imei 1 and 2 via dialing *#06#.. ibig sabihin nababasa ung simcards. Signal lang talaga ang wala. Problem not solved sa reprogram.

Step 2: Proceed sa hardware. Buksan ung unit at e apply ang visual checking... Purpose is baka my makita kang clue sa sira. In my case nakita ko na ung galaw pero hindi nadali sa previous repair.


Step 3: Since common issue ito sa android, merong tinatawag na wtr ic or signal ic. Better kong marunong kayo magcheck ng working condition ng ic ☝️☝️ In my case, dinaan ko sa schematic analysis. Note, common issue ito kea pwedi mo na palitan agad ☝️.

Step 4: Un nga, as per working condition, good ang supply ng signal ic.. (wtr ic) Replaced wtr ic ang problem solved.. ☝️IMG_20230124_185707.jpg

IMG_20230124_185611.jpg

defect_1.png
defect_2.png
IMG20230124180242.jpg
IMG20230124180150.jpg
 
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