Dell Inspiron 7590 2in1 Service Manual Download

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Troubleshooting

Handling swollen Lithium-ion batteries

Like most laptops, Dell laptops use lithium-ion batteries. One type of lithium-ion battery is the lithium-ion polymer battery.
Lithium-ion polymer batteries have increased in popularity in recent years and have become standard in the electronics industry
due to customer preferences for a slim form factor (especially with newer ultra-thin laptops) and long battery life. Inherent to
lithium-ion polymer battery technology is the potential for swelling of the battery cells.

Swollen battery may impact the performance of the laptop. To prevent possible further damage to the device enclosure or
internal components leading to malfunction, discontinue the use of the laptop and discharge it by disconnecting the AC adapter
and letting the battery drain.

Swollen batteries should not be used and should be replaced and disposed of properly. We recommend contacting Dell product
support for options to replace a swollen battery under the terms of the applicable warranty or service contract, including options
for replacement by a Dell authorized service technician.

The guidelines for handling and replacing Lithium-ion batteries are as follows:

●

Exercise caution when handling Lithium-ion batteries.

●

Discharge the battery before removing it from the system. To discharge the battery, unplug the AC adapter from the system
and operate the system only on battery power. When the system will no longer power on when the power button is pressed,
the battery is fully discharged.

●

Do not crush, drop, mutilate, or penetrate the battery with foreign objects.

●

Do not expose the battery to high temperatures, or disassemble battery packs and cells.

●

Do not apply pressure to the surface of the battery.

●

Do not bend the battery.

●

Do not use tools of any type to pry on or against the battery.

●

If a battery gets stuck in a device as a result of swelling, do not try to free it as puncturing, bending, or crushing a battery
can be dangerous.

●

Do not attempt to reassemble a damaged or swollen battery into a laptop.

●

Swollen batteries that are covered under warranty should be returned to Dell in an approved shipping container (provided
by Dell)—this is to comply with transportation regulations. Swollen batteries that are not covered under warranty should be
disposed of at an approved recycling center. Contact Dell product support at

https://www.dell.com/support

for assistance

and further instructions.

●

Using a non-Dell or incompatible battery may increase the risk of fire or explosion. Replace the battery only with a
compatible battery purchased from Dell that is designed to work with your Dell computer. Do not use a battery from other
computers with your computer. Always purchase genuine batteries from

https://www.dell.com

or otherwise directly from

Dell.

Lithium-ion batteries can swell for various reasons such as age, number of charge cycles, or exposure to high heat. For more
information on how to improve the performance and lifespan of the laptop battery and to minimize the possibility of occurrence
of the issue, see

Dell Laptop Battery - Frequently Asked Questions

Built-in self-test (BIST)

There are three different types of BIST to check the performance of display, power rail, and system board. These tests are
important to evaluate if an LCD or System board needs a replacement.
1. M-Bist: M-BIST is the system board built-in self-test diagnostics tool that improves the diagnostics accuracy of system

board embedded controller (EC) failures. M-BIST must be manually initiated before POST and can also run on a dead
system .

2. L-BIST: L-BIST is an enhancement to the single LED error code diagnostics and is automatically initiated during POST.
3. LCD-BIST: LCD BIST is an enhanced diagnostic test that is introduced through Preboot System Assessment (PSA) on legacy

systems.

Troubleshooting

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