UPDATE 3-Dell sees lower Q2 margins, stock falls

* Dell sees lower fiscal Q2 gross margins

* Fiscal Q2 revenue to increase slightly sequentially

* Demand stabilizing but customers still deferring orders

* Shares fall 4 percent in after-hours trading (Adds more details on meeting, analyst comment, background)

By Gabriel Madway

AUSTIN, Texas, July 13 (Reuters) - Dell Inc (DELL.O) forecast lower gross margins in the July quarter as demand has shifted toward cheaper computers such as netbooks, while prices of components are rising, sending its shares down 4 percent.

Dell, which has been working through a painful turnaround effort, on Monday estimated a "modest decline" in fiscal second-quarter gross margins but did not give a specific forecast. It also said it expects a "slight" sequential increase in revenue for the quarter.

"We continue to believe that customers are deferring IT purchases, and that we will see demand return to more typical levels at some point," Chief Financial Officer Brian Gladden said in a statement.

The outlook from the world's No. 2 maker of personal computers came on the eve of its analyst day in Austin, Texas. Dell has not been providing forecasts in its quarterly earnings reports, so the announcement provided Wall Street with its first financial targets in some time.

"Dell's story has been all about profitability over growth, so if the product mix is shifting to the low end and that's impacting profitability, then that really hurts Dell's value proposition," said Collins Stewart analyst Ashok Kumar.

Dell, like other PC makers, has been hurt by slumping tech demand during the global recession, with one of the only bright spots being cheap netbook computers that analysts say offer thinner profit margins.

Components costs, which fell steeply due to oversupply last year, have also recovered in recent months as suppliers have cut back on capacity during the global recession.

While Gladden said demand for Dell's products and services seems to have stabilized, he noted that that varied significantly by segment and geography.

Kaufman Bros analyst Shaw Wu said Dell's second-quarter outlook was in-line to a little below what Wall Street was expecting. The average analyst forecast was for revenue of $12.6 billion, which would be up 2 percent sequentially, according to Reuters Estimates.

Wu said the shares were likely reacting to the gross margin forecast, which Dell said was the result of "higher component costs, a competitive pricing environment, and an unfavorable mix of product and business-segment demand."

"This forecast is a little lighter than what people thought," Wu said.