HP RP9 No Boot After Lightning Strike: Diagnostic Report... | terminalfaults.org

Technical Background:

Lightning strikes induce high-voltage surges in electrical systems. These surges can propagate through the power grid and network cabling, potentially damaging sensitive electronic components on the motherboard. Key components susceptible to damage include the power supply unit (PSU), voltage regulators, and integrated circuits (ICs). ESD can also damage the motherboard.

Symptoms:

System fails to power on following a nearby lightning strike. No POST (Power On Self Test) sequence observed. No display output. System appears completely unresponsive.

Possible Causes:

Power supply unit (PSU) failure due to surge.
Motherboard damage due to overvoltage.
Damage to the system's BIOS chip.
Surge damage to integrated circuits (ICs) on the motherboard.
Corrupted firmware due to power fluctuation.
Network Interface Controller (NIC) damage, potentially backfeeding to the motherboard.

Solution:

1

Safe Handling: Disconnect the HP RP9 from the power outlet.
2

Inspect the power cable for visible damage (burns, melting). Replace if damaged.
3

Check the power outlet with a multimeter to confirm proper voltage output (120V AC +/- 10% in North America).
4

Connect the HP RP9 to a known working power outlet on a different circuit.
5

Examine the external ports (USB, Ethernet) for signs of physical damage (burns, melting).
6

Inspect the Ethernet cable and replace it to rule out a network-related cause for the no-boot issue.
7

If the system remains unresponsive, contact HP support for authorized repair or replacement options, considering the likelihood of internal component failure.

Safety Warning:

Electrical surges can cause fire and electrocution hazards. Do not attempt to open or repair the HP RP9 yourself due to potential electrical shock and anti-tamper mechanisms. Ensure the device is disconnected from power before inspection. Avoid contact with damaged components.

Prevention:

Install a surge protector with sufficient joule rating to protect the HP RP9 from power surges. Ensure proper grounding of the electrical system. Regularly inspect cables for wear and tear. Implement cable management to minimize strain on connectors.

Expert Tip:

Try a 'cold boot': Disconnect the power cable, press and hold the power button for 30 seconds, then reconnect the power and attempt to boot. This can sometimes reset the system. Note down any error codes or LED patterns observed during the attempted boot process for reporting to HP support.

Frequently Asked Questions

•What type of surge protector is recommended?

A surge protector with a joule rating appropriate for point-of-sale equipment is recommended. Consult with an electrician for specific recommendations.

•What are the risks of electrostatic discharge (ESD) in this environment?

Low humidity in the retail environment, especially during winter, increases the risk of ESD. ESD can damage sensitive electronic components. Use anti-static mats and wrist straps when handling any electronic equipment.

•How frequently should I inspect the cables and power cords?

Cables and power cords should be visually inspected monthly for any signs of damage or wear. Damaged cables should be replaced immediately.

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What type of surge protector is recommended?

•What are the risks of electrostatic discharge (ESD) in this environment?

•How frequently should I inspect the cables and power cords?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: