Search found 23 matches

by arshad
Thu Nov 10, 2016 7:53 pm
Forum: HP-Compaq
Topic: HP Stream 13-DA0Y0BMB6C0
Replies: 3
Views: 2648

HP Stream 13-DA0Y0BMB6C0

HP Stream 13-DA0Y0BMB6C0
by arshad
Wed Nov 09, 2016 8:57 pm
Forum: Laptop Case Studies
Topic: DELL 3542-NO POWERING ON
Replies: 7
Views: 4921

DELL 3542-NO POWERING ON

DELL 3542-NO POWERING ON

THE UNIT WAS DEAD. TRACED 5V_S5 WAS FOUND SHORTED. STARTED FINDING SHORTED COMPONENTS.
SHORTED COMPONENTS WERE RAM IC, S5-SO CONVERTIBLE IC & THREE 5 LEG COMPONENTS IN USB SECTION. NOW THE UNIT WAS ON BUT NO DISPLAY. FINALLY REFLASHED THE PCH BIOS AND GOT DISPLAY
by arshad
Wed Nov 09, 2016 8:50 pm
Forum: Laptop Case Studies
Topic: LENOVO G585-DEAD-AWESOME CASE STUDY
Replies: 1
Views: 1664

LENOVO G585-DEAD-AWESOME CASE STUDY

GOT THE UNIT AS DEAD. [hidden]CHECKED 19V, 3V 5V ALW WERE OK. RTC SECTION WAS ALSO OK. NBSWON# SIGNAL, DNBSWON# SIGNAL WERE ALSO OK. PWRBTNOUT WAS ALSO OK. SLP_S4 & SLP_S3 SIGNALS WERE ALSO OK. BUT IT WAS THE POINT TO NOTICEABLE THAT THERE WAS NO SUSP. CHECKED THE SUSP BY JUMPERING FROM 3.3V ALW...
by arshad
Wed Nov 09, 2016 8:33 pm
Forum: Laptop Case Studies
Topic: SAMSUNG NP300E-DEAD
Replies: 6
Views: 4509

SAMSUNG NP300E-DEAD

SAMSUNG NP300E-DEAD THE UNIT WAS DEAD. CHECKED THE VOLTIN SECTION OUTPUT IS OK..BUT NO 3V5V ALW WERE NOT PRESENT. FIRST CHECKED THE VCC LINE OF THE STEPDOWN IC "TPS51125". FOUND THE IMPEDANCXE OF VCC LINE OF TPS51125 WAS VERY LOW. THE LIEN WAS CONNECTED BY ONE RESISTER AND CAPACITOR. THE I...
by arshad
Wed Nov 09, 2016 8:33 pm
Forum: Laptop Case Studies
Topic: COMPAQ C700-NOT POWERING ON
Replies: 2
Views: 2034

COMPAQ C700-NOT POWERING ON

COMPAQ C700

Fault:
MB WAS NOT POWERING ON.

DIAGNOSIS:
AFTER PRESSING POWER BUTTON, DC JACK LED GOES OFF.
FOUND 5VS LINE OUTPUT SHORTED.
CHECKED AND FOUND CAPS PRESENT ON INPUT OF ODD SECTION SHORTED. REMOVED THAT CAPS. +5VS LINE GOT CLEARED. NOW MB TUNRED ON.
by arshad
Wed Nov 09, 2016 8:32 pm
Forum: Laptop Case Studies
Topic: DELL 5010 GFX MODEL-DEAD
Replies: 0
Views: 1114

DELL 5010 GFX MODEL-DEAD

DELL 5010 GFX MODEL-DEAD CHECKED 3V 5V ALW WAS OK. RSMRST# WAS OK. NBSWON# & DNBSWON# WERE ALSO OK. BUT NO SLP_S4 AND SLP_S3 SIGNALS WERE COMING. FINALLY REBALLED THE PCH. NOW MB GOT POWER ON AND OFF WITHIN FEW SECONDS. TRACED THE ATI CHIP WAS FOUND SHORTED. DISCONNECTED THE GPU SUPPLY COIL. NOW...
by arshad
Wed Nov 09, 2016 8:31 pm
Forum: Laptop Case Studies
Topic: TOSHIBA C55-BIOS PASSWORD RESET
Replies: 4
Views: 3415

TOSHIBA C55-BIOS PASSWORD RESET

TOSHIBA C55-BIOS PASSWORD RESET

THE UNIT WAS CAME FOR RESETTING THE BIOS PASSWORD. GOT THE TESTED BIOS FROM VINAFIX.VN (BY HELP OF ARUN SIR) AND WRITTEN TO THE BIOS CHIP. AND THE SYSTEM WAS POWER ON WITHOUT BIOS PASSWORD. HAPPY
by arshad
Wed Nov 09, 2016 8:30 pm
Forum: Laptop Case Studies
Topic: DELL 630-DIM DISPLAY
Replies: 0
Views: 1185

DELL 630-DIM DISPLAY

DELL 630-DIM DISPLAY THE UNIT WAS CAME FOR REPAIRING DIM DISPLAY PROBLEM. I CHECKED AND FOUND THE INVERTER WAS OK BUT THE ENABLE SIGNAL 3.3V WAS MISSING. I REPLACED THE ORIGINAL INVERTER BY ONE GOOD UNIVERSAL INVERTER. PUT JUMPER FROM 3.3VS AS ENABLE SIGNAL FOR THE INVERTER. NOW THE DIM DISPLAY CASE...
by arshad
Wed Nov 09, 2016 8:29 pm
Forum: Laptop Case Studies
Topic: LA-7912P-DEAD
Replies: 7
Views: 4780

LA-7912P-DEAD

LA-7912P-DEAD

THE UNIT WAS DEAD. FOUND VOLT IN SECTION FINAL OUTPUT VOLTAGE WAS 3V. AND THE CHARGER IC "BQ25A" WAS HEATING. REPLACED THE CHARGER IC WITH NEW. NOW THE UNIT WAS TURNED ON WITH PROPER DISPLAY. HAPPY
by arshad
Mon Nov 07, 2016 5:11 pm
Forum: Others
Topic: WIPRO NOTEBOOK 7710P
Replies: 1
Views: 1698

WIPRO NOTEBOOK 7710P

WIPRO NOTEBOOK 7710P

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