Lac701p Rev 10 Boardview Patched -
The LAC701P Rev 10 is an 8-layer board (Top, Inner1, GND, Power1, Power2, Inner2, Inner3, Bottom). The original boardview often misplaces vias on inner layers, showing a trace connecting to Layer 3 when it actually routes through Layer 5. This leads to wasted time probing non-existent connections.
Many LA-C701P boards suffer from slow boot times or fan speed issues after a BIOS chip replacement. Modification:
Before loading up your boardview software, it helps to know what typically fails on this specific Lenovo motherboard. Experienced repair technicians frequently report the following issues: 1. Shorted Ceramic Capacitors on +19V (VIN Rail) lac701p rev 10 boardview patched
If you have downloaded a boardview file ( .bv , .asc , .brd ) labeled "patched," it usually means the file has been modified to correct errors found in the original manufacturer files or to make it compatible with specific boardview software.
It's critical to ensure that any file you download matches your exact motherboard model () and revision ( Rev 1.0 ) to prevent using incorrect data. The LAC701P Rev 10 is an 8-layer board
: Missing RTC_RST# or SRTC_RST# signals can prevent the board from triggering.
Trace the line to its next destination (e.g., a via or a resistor across the board). Many LA-C701P boards suffer from slow boot times
To repair an LA-C701P board efficiently, you will need software like or FlexBV , along with the patched .CAD , .BRD , or .BDV file, and a digital multimeter.
Click the pins of PQ301 and PQ302 (input MOSFETs) to trace the 19V path ( VIN ). The patched file accurately highlights the gate control lines leading back to the charging IC. 2. Missing 3.3V and 5V Always-On Rails
The SY8208B (or similar Richtek/Silergy chips) responsible for generating +3VALW and +5VALW frequently fail or burn out due to liquid damage near the keyboard or trackpad connectors. Step-by-Step Troubleshooting Using the Patched Boardview