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The +B+ rail travels everywhere on this board. In the patched boardview, click on the output pad of the second input MOSFET. The software will highlight dozens of decoupling capacitors across the entire top and bottom layers. This allows you to systematically inject 1V to 2V into the rail and trace the heat, isolating the exact shorted MLCC capacitor. C. No Power / Blinking Light (EC/SIO Corrupt or Dead)
If you've had success (or run into trouble) finding a boardview for the LA-C701P, share your experience in the comments to help fellow technicians on their repair journey!
identifies which resistors must be shifted to change the board's hardware ID. 4. Maintenance and Diagnostic Steps Visual Inspection: Boardview and Schematic lac701p rev 10 boardview patched
Use the search function in the viewer to find resistors ( Rxxxxcap R x x x x ) or capacitors ( Cxxxxcap C x x x x ) mentioned in the schematic.
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.
: Use the boardview to trace the Enable (EN) signals for the 3.3V/5V PWM controller. The patched boardview allows you to quickly see which jumpers or resistors might be open. 3. Low Standby Current Issues If you found this review helpful, consider supporting
Certain vital lines, such as the +3V_EC or EC_ON signals, may appear broken or unconnected in the software layout compared to physical reality.
When a pad corrodes completely away, you lose the trace path. By clicking the damaged pad in the patched boardview, you can see exactly where that trace was supposed to go. You can then easily solder a micro-jumper wire from a nearby component or via to restore continuity. 5. Technical Summary and Pin Mapping Tips Target Component Crucial Test Point/Component to Locate PU301 Charging / B+ Rail Control Check ACIN and REGN voltages on nearby caps PU501 / PU502 3.3V / 5V Buck Converters Verify Enable ( EN ) signals from the EC PJ301 / PJ501 Solder Jumpers Isolate specific voltage rails by cutting these U2 Check Pin 8 for +3V_SPI supply voltage
The patched version of the LA-C701P Rev 1.0 boardview turns a difficult, blind diagnostic process into a highly visual, precise repair. By fixing the omissions of the original factory data, it allows you to trace power rails, locate shorted capacitors, and verify essential control signals with absolute confidence, saving hours of guesswork and protecting delicate components from accidental damage. The software will highlight dozens of decoupling capacitors
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How the boardview helps : Identify and test the BIOS chip location (25L6473EM). The boardview provides coordinates for the SPI flash ROM, enabling BIOS programmer attachment and verification.