CASE STUDY 2
HP pavilion x360 (Schematic unavailable, use ic's datasheet)
Problem: Dead with high ampere (8v_ 0.243A)

Solution:
1.Check Volt-in section Ok✅

2. Step-Down section 3.3 Voltage section is deep heating❌
3. Replace IC but same problem🧐
(Mostly in this type cases LDO Output voltage going shot.)

4. Remove ic and drop directly 2volt on ic pin no 5( 3.3v_LDO) now ampere is increased upto 0.455A..

5.Try to feel heating anywhere on motherboard Yes 😉on PF is heating.

6. Remove the Capacitor now ampere is normal 0.014✅

7. Again place the 3.3volt ic and plug the power. Ampere take only 0.005A thats not good❌

8. On LDO only 0.5** voltage😳
But on ldo pin no any voltage leakage or ic 100% Ok. I don't know what's was the problem..

9. Now i need LDO 3.3 voltage.

10. 5VOLT section LDO 3.3v ok
Jumper 5Volt section LDO pin To 3.3volt LDO pin.

Yes ampere ok 19V_0.016A

Laptop Power on and working fine..🤓

I this channel which bios is tag with SRGinfotech .. means Bios file is 110% ok and tested by me...

Or without tag may be some files corrupted.. 😊😊

Case study: 3
@SRGinfotech

Model No: La-9104p 💻

Problem: Dead / No power❌ ( With high ampere _ 7V : 0.092A)😳

Solution:📖
1.Charing ic Overheating 🔥

2.Change ic. Now ampere goes 0.012A☺️

3. Press power button but Laptop not getting on🤔

4. Check step_down section working ok 3.3v / 5volt ok✅ (EC_ON Working means EC_VDD0 OK)

5. Check i/o
A-) AC_IN ok✅
B-) EC_RST ok✅
C-) EC_VDD/VCC ok✅ ( power supply for #Digital panel)

D-) PWRBTN_IN Status ok (H_L_H)

E-) But PWRBTN_OUT ❌ Continue High. No triggering

F-) Flash I/O (9012)
2MB Bios &. 4MB bios But same status. Also try with new I/O but Same problem
🤨🧐🧐🧐🤨🤨🤨🤔🤔🤔🤔
G-) EC_AVDD ok✅ ( power supply for #analog power panel)

H-) AGND missing😳❌ ( power Ground for Analog panel)

6. AGND ( io pin no 69) connected coil is fault 🎣🎣

7. Remove coil and short the track with ground.🎯

Laptop working fine 😌

EC 15-3521 La-9104p rev 1.0 Rested by SRGinfotech✅

Satellite C855 L855 S855 DK10FG-6050A2491301-MB-A02

Tested by SRGinfotech working

ITE_8995e ec & main x541uvk SRGinfotech

Pegatron IPM41-D3 rev 1.00 SRGinfotech tested

ga-b250m-d2v tested by SRGinfotech

Intel DH61WW AA G23116-206 cpu sr05y