High-value resistors in the PWM IC start-up circuit can go high-resistance. 4. Key Components on the 17IPS72 Board PFC Controller & MOSFETs: Controls the Secondary Diodes: Rectify the output to low-voltage DC ( Electrolytic Capacitors: Common failure point (typically 5. Tips for 17IPS72 Repair
Boardview allows you to locate test points, resistors, and capacitors without tracing blindly.
Example: +3VS5_EC -> PCH_RSMRST# .
Do you have a specific failure on your 17ips72-based laptop? Leave a comment or consult the Badcaps.net forum thread dedicated to Compal LA-J871P – the community has already solved most issues you’ll encounter.
: Look for the main filter reservoir capacitor (usually rated for 450V). When the TV is fully powered on, the schematic dictates that voltage across this capacitor should jump from roughly 320V DC up to 400V DC . 2. Standby and Low-Voltage Generation
When asking for help, always mention your and provide voltage measurements taken directly from the schematic’s test points. This will allow others to give you precise guidance.
Corrupt BIOS often causes "no display but power on" or "power button dead." Always verify with schematic that CS# (chip select) toggles on U18 during boot.